diff --git a/app/build.gradle b/app/build.gradle
index c5cf1b8..427be29 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -42,6 +42,9 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'com.google.android.material:material:1.6.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.fragment:fragment-ktx:1.8.8'
+    implementation 'com.google.android.material:material:1.5.0'
+    implementation 'androidx.fragment:fragment:1.8.8'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9604b34..b716662 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -15,12 +15,20 @@
         <activity
             android:name=".MainActivity"
             android:exported="true">
+        </activity>
+        <activity
+            android:name=".ActivityA"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ActivityB"
+            android:exported="true">
+        </activity>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ActivityA.kt b/app/src/main/java/otus/gpb/homework/fragments/ActivityA.kt
new file mode 100644
index 0000000..bcc4768
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ActivityA.kt
@@ -0,0 +1,18 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+
+class ActivityA : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_fragment_a)
+
+        if (savedInstanceState == null) {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragment_activity_container, FragmentA())
+                .commit()
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ActivityB.kt b/app/src/main/java/otus/gpb/homework/fragments/ActivityB.kt
new file mode 100644
index 0000000..7660e08
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ActivityB.kt
@@ -0,0 +1,37 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.graphics.Color
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+
+class ActivityB : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_fragment_b)
+
+        if (savedInstanceState == null) {
+            val currentOrientation = resources.configuration.orientation
+            val fragmentBA = FragmentBA.newInstance(Color.WHITE)
+
+            if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
+                supportFragmentManager.beginTransaction()
+                    .replace(R.id.fragment_b_activity_container, fragmentBA)
+                    .commit()
+            } else {
+                val fragmentBB = FragmentBB.newInstance(Color.YELLOW)
+
+                supportFragmentManager.beginTransaction()
+                    .replace(R.id.fragment_container_ba_land, fragmentBA)
+                    .replace(R.id.fragment_container_bb_land, fragmentBB)
+                    .commit()
+            }
+        }
+    }
+
+    companion object {
+        const val REQUEST_KEY_COLOR = "request_key_color"
+        const val BUNDLE_KEY_COLOR = "bundle_key_color"
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ChildFragmentAA.kt b/app/src/main/java/otus/gpb/homework/fragments/ChildFragmentAA.kt
new file mode 100644
index 0000000..51fe163
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ChildFragmentAA.kt
@@ -0,0 +1,66 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.fragment.app.Fragment
+
+class ChildFragmentAA : Fragment() {
+
+    private var listener: ParentFragmentListener? = null
+    private var backgroundColor: Int = Color.WHITE
+
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+        if (parentFragment is ParentFragmentListener) {
+            listener = parentFragment as ParentFragmentListener
+        } else {
+            throw RuntimeException("${parentFragment} must implement ParentFragmentListener")
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backgroundColor = it.getInt(ARG_BACKGROUND_COLOR)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(R.layout.child_fragment_aa, container, false)
+        view.setBackgroundColor(backgroundColor)
+        val openChildFragmentABButton: Button =
+            view.findViewById(R.id.button_open_child_fragment_ab)
+        openChildFragmentABButton.setOnClickListener {
+            listener?.onOpenChildFragmentABClicked()
+        }
+        return view
+    }
+
+    override fun onDetach() {
+        super.onDetach()
+        listener = null
+    }
+
+    companion object {
+        private const val ARG_BACKGROUND_COLOR = "background_color"
+
+        fun newInstance(color: Int): ChildFragmentAA {
+            val fragment = ChildFragmentAA()
+            val args = Bundle().apply {
+                putInt(ARG_BACKGROUND_COLOR, color)
+            }
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ChildFragmentAB.kt b/app/src/main/java/otus/gpb/homework/fragments/ChildFragmentAB.kt
new file mode 100644
index 0000000..099c1a1
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ChildFragmentAB.kt
@@ -0,0 +1,43 @@
+package otus.gpb.homework.fragments
+
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+
+class ChildFragmentAB : Fragment() {
+
+    private var backgroundColor: Int = Color.WHITE
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backgroundColor = it.getInt(ARG_BACKGROUND_COLOR, Color.WHITE)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(R.layout.child_fragment_ab, container, false)
+        view?.setBackgroundColor(backgroundColor)
+        return view
+    }
+
+    companion object {
+        private const val ARG_BACKGROUND_COLOR = "background_color_ab"
+
+        fun newInstance(color: Int): ChildFragmentAB {
+            val fragment = ChildFragmentAB()
+            val args = Bundle().apply {
+                putInt(ARG_BACKGROUND_COLOR, color)
+            }
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
new file mode 100644
index 0000000..d070f3e
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
@@ -0,0 +1,105 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.activity.OnBackPressedCallback
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+
+
+class FragmentA : Fragment(), ParentFragmentListener {
+
+    private lateinit var openChildFragmentAAButton: Button
+    private lateinit var onBackPressedCallback: OnBackPressedCallback
+
+    private val childBackStackListener = FragmentManager.OnBackStackChangedListener {
+        updateOpenChildButtonVisibility()
+    }
+
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(R.layout.fragment_parent_a, container, false)
+
+        openChildFragmentAAButton = view.findViewById(R.id.button_open_fragment_aa)
+
+        openChildFragmentAAButton.setOnClickListener {
+            openChildFragmentAA()
+        }
+
+        onBackPressedCallback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                if (childFragmentManager.backStackEntryCount > 0) {
+                    childFragmentManager.popBackStack()
+                } else {
+                    isEnabled = false
+                    requireActivity().onBackPressedDispatcher.onBackPressed()
+                    isEnabled = true
+                }
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(
+            viewLifecycleOwner,
+            onBackPressedCallback
+        )
+
+        childFragmentManager.addOnBackStackChangedListener(childBackStackListener)
+        updateOpenChildButtonVisibility()
+        return view
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        childFragmentManager.removeOnBackStackChangedListener(childBackStackListener)
+    }
+
+    private fun updateOpenChildButtonVisibility() {
+        val hasChildFragment =
+            childFragmentManager.findFragmentById(R.id.parent_fragment_a_child_container) != null
+        val isChildBackStackEmpty = childFragmentManager.backStackEntryCount == 0
+
+        if (hasChildFragment && isChildBackStackEmpty) {
+        } else if (!hasChildFragment && isChildBackStackEmpty) {
+            openChildFragmentAAButton.visibility = View.VISIBLE
+        } else {
+            openChildFragmentAAButton.visibility = View.GONE
+        }
+
+        openChildFragmentAAButton.visibility =
+            if (childFragmentManager.backStackEntryCount == 0 && childFragmentManager.findFragmentById(
+                    R.id.parent_fragment_a_child_container
+                ) == null
+            ) View.VISIBLE else View.GONE
+        openChildFragmentAAButton.visibility =
+            if (childFragmentManager.backStackEntryCount == 0) View.VISIBLE else View.GONE
+    }
+
+    private fun openChildFragmentAA() {
+        val randomColor = ColorGenerator.generateColor()
+        val childFragmentAA = ChildFragmentAA.newInstance(randomColor)
+        childFragmentManager.beginTransaction()
+            .replace(R.id.parent_fragment_a_child_container, childFragmentAA)
+            .addToBackStack("ChildFragmentAA")
+            .commit()
+        openChildFragmentAAButton.visibility = View.GONE
+    }
+
+    private fun openChildFragmentAB() {
+        val randomColor = ColorGenerator.generateColor()
+        val childFragmentAB = ChildFragmentAB.newInstance(randomColor)
+        childFragmentManager.beginTransaction()
+            .replace(R.id.parent_fragment_a_child_container, childFragmentAB)
+            .addToBackStack("ChildFragmentAB")
+            .commit()
+    }
+
+    override fun onOpenChildFragmentABClicked() {
+        openChildFragmentAB()
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
new file mode 100644
index 0000000..be886f9
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
@@ -0,0 +1,87 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.fragment.app.Fragment
+
+class FragmentBA : Fragment() {
+
+    private var backgroundColor: Int = Color.WHITE
+    private lateinit var openFragmentBBButton: Button
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backgroundColor = it.getInt(ARG_BACKGROUND_COLOR, Color.WHITE)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(
+            R.layout.fragment_ba,
+            container,
+            false
+        )
+        view.setBackgroundColor(backgroundColor)
+        return view
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        parentFragmentManager.setFragmentResultListener(
+            ActivityB.REQUEST_KEY_COLOR,
+            viewLifecycleOwner
+        ) { requestKey, bundle ->
+            if (requestKey == ActivityB.REQUEST_KEY_COLOR) {
+                val newColor = bundle.getInt(ActivityB.BUNDLE_KEY_COLOR, Color.WHITE)
+                view.setBackgroundColor(newColor)
+                this.backgroundColor = newColor
+            }
+        }
+
+        openFragmentBBButton = view.findViewById(R.id.button_open_fragment_bb)
+
+        val currentOrientation = resources.configuration.orientation
+        if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
+            openFragmentBBButton.visibility = View.VISIBLE
+            openFragmentBBButton.setOnClickListener {
+                openFragmentBBInPortrait()
+            }
+        } else {
+            openFragmentBBButton.visibility = View.GONE
+        }
+    }
+
+    private fun openFragmentBBInPortrait() {
+        val randomColor = ColorGenerator.generateColor()
+        val fragmentBB = FragmentBB.newInstance(randomColor)
+
+        parentFragmentManager.beginTransaction()
+            .replace(R.id.fragment_b_activity_container, fragmentBB)
+            .addToBackStack("FragmentBBFromBA")
+            .commit()
+    }
+
+    companion object {
+        private const val ARG_BACKGROUND_COLOR = "background_color_ba"
+
+        fun newInstance(color: Int): FragmentBA {
+            val fragment = FragmentBA()
+            val args = Bundle().apply {
+                putInt(ARG_BACKGROUND_COLOR, color)
+            }
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
new file mode 100644
index 0000000..b2dba91
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
@@ -0,0 +1,55 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.fragment.app.Fragment
+
+class FragmentBB : Fragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(R.layout.fragment_bb, container, false)
+        view.setBackgroundColor(Color.YELLOW)
+        return view
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        val changeColorButton: Button = view.findViewById(R.id.button_send_color)
+        changeColorButton.setOnClickListener {
+            val newColor = ColorGenerator.generateColor()
+            val result = Bundle().apply {
+                putInt(ActivityB.BUNDLE_KEY_COLOR, newColor)
+            }
+            parentFragmentManager.setFragmentResult(ActivityB.REQUEST_KEY_COLOR, result)
+
+            val currentOrientation = resources.configuration.orientation
+            if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
+                parentFragmentManager.popBackStack()
+
+            }
+        }
+    }
+
+    companion object {
+        private const val ARG_BACKGROUND_COLOR = "background_color_bb"
+
+        fun newInstance(color: Int): FragmentBB {
+            val fragment = FragmentBB()
+            val args = Bundle().apply {
+                putInt(ARG_BACKGROUND_COLOR, color)
+            }
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt b/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
index 5e89c44..75597d2 100644
--- a/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
+++ b/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
@@ -1,12 +1,27 @@
 package otus.gpb.homework.fragments
 
+import android.content.Intent
 import android.os.Bundle
+import android.widget.Button
 import androidx.appcompat.app.AppCompatActivity
 
+
 class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        val openFragmentAButton = findViewById<Button>(R.id.button_open_fragment_a)
+        openFragmentAButton.setOnClickListener {
+            val intent = Intent(this, ActivityA::class.java)
+            startActivity(intent)
+        }
+
+        val openFragmentBButton = findViewById<Button>(R.id.button_open_fragment_b)
+        openFragmentBButton.setOnClickListener {
+            val intent = Intent(this, ActivityB::class.java)
+            startActivity(intent)
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ParentFragmentListener.kt b/app/src/main/java/otus/gpb/homework/fragments/ParentFragmentListener.kt
new file mode 100644
index 0000000..c238e70
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ParentFragmentListener.kt
@@ -0,0 +1,5 @@
+package otus.gpb.homework.fragments
+
+interface ParentFragmentListener {
+    fun onOpenChildFragmentABClicked()
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout-land/activity_fragment_b.xml b/app/src/main/res/layout-land/activity_fragment_b.xml
new file mode 100644
index 0000000..3035edb
--- /dev/null
+++ b/app/src/main/res/layout-land/activity_fragment_b.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:orientation="horizontal"
+    tools:context=".ActivityB">
+
+    <FrameLayout
+        android:id="@+id/fragment_container_ba_land"
+        android:layout_width="48dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1" />
+
+    <FrameLayout
+        android:id="@+id/fragment_container_bb_land"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"/>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_fragment_a.xml b/app/src/main/res/layout/activity_fragment_a.xml
new file mode 100644
index 0000000..10b4042
--- /dev/null
+++ b/app/src/main/res/layout/activity_fragment_a.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.fragment.app.FragmentContainerView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/fragment_activity_container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</androidx.fragment.app.FragmentContainerView>
diff --git a/app/src/main/res/layout/activity_fragment_b.xml b/app/src/main/res/layout/activity_fragment_b.xml
new file mode 100644
index 0000000..2e8bc1f
--- /dev/null
+++ b/app/src/main/res/layout/activity_fragment_b.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.fragment.app.FragmentContainerView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/fragment_b_activity_container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context=".ActivityB">
+
+</androidx.fragment.app.FragmentContainerView>
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 17eab17..23d65cb 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -6,13 +6,27 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <Button
+        android:id="@+id/button_open_fragment_a"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:text="@string/button_open_fragment_a"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.405" />
+
+    <Button
+        android:id="@+id/button_open_fragment_b"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/button_open_fragment_b"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.497"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/button_open_fragment_a"
+        app:layout_constraintVertical_bias="0.044" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/child_fragment_aa.xml b/app/src/main/res/layout/child_fragment_aa.xml
new file mode 100644
index 0000000..7684ddd
--- /dev/null
+++ b/app/src/main/res/layout/child_fragment_aa.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/button_open_child_fragment_ab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/button_open_child_fragment_ab"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/child_fragment_ab.xml b/app/src/main/res/layout/child_fragment_ab.xml
new file mode 100644
index 0000000..0f36c22
--- /dev/null
+++ b/app/src/main/res/layout/child_fragment_ab.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_ba.xml b/app/src/main/res/layout/fragment_ba.xml
new file mode 100644
index 0000000..5753039
--- /dev/null
+++ b/app/src/main/res/layout/fragment_ba.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/button_open_fragment_bb"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/button_open_fragment_bb"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_bb.xml b/app/src/main/res/layout/fragment_bb.xml
new file mode 100644
index 0000000..e9c1b6e
--- /dev/null
+++ b/app/src/main/res/layout/fragment_bb.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/button_send_color"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/send_color_button_text"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_parent_a.xml b/app/src/main/res/layout/fragment_parent_a.xml
new file mode 100644
index 0000000..098e13b
--- /dev/null
+++ b/app/src/main/res/layout/fragment_parent_a.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/button_open_fragment_aa"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/button_open_child_fragment_aa"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+    <FrameLayout
+        android:id="@+id/parent_fragment_a_child_container"
+        app:layout_constraintTop_toBottomOf="@id/button_open_fragment_aa"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 34277aa..fb99e84 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,11 @@
 <resources>
     <string name="app_name">Fragments</string>
+    <string name="button_open_fragment_a">Open Fragment A</string>
+    <string name="button_open_fragment_b">Open Fragment B</string>
+    <string name="button_open_child_fragment_aa">Open Child Fragment AA</string>
+    <string name="button_open_child_fragment_ab">Open Child Fragment AB</string>
+    <string name="button_open_fragment_bb">Open Fragment BB</string>
+    <string name="send_color_button_text">Send Color</string>">
+
+
 </resources>
\ No newline at end of file