MIT App Inventor is an online app development platform that can be used to build your own apps that will play on an Android device. The "create" platform has two main views: Designer and Blocks. In the Designer view, you can drag-and-drop elements that you want to display on your app screen. In the Blocks view, you use the visual programming blocks to give each element code to tell it what to do.
To see how your app functions, you can use the emulator on the laptop or connect a real Android device.
Create a new project. Add some buttons to Screen1.
Add a new screen and add a button to this screen. Call this button "Home".
Code the buttons to switch between the screens.
Make at least three new screens.
Add images to the screens.
Change the appearance of the buttons. Change the colour, font colour, font size, button size etc.
Endangered Animals
Control-click on an image and save it to the downloads folder so you can upload it in MIT App Inventor. These images are all public domain images (CC0). This means you are allowed to reuse them in your own work.