1. App Inventor 2 @http://appinventor.mit.edu/explore/get-started
Want to learn how to make mobile apps for your Android phone or tablet?

2. App Inventor2 Develop apps on website: ai2.appinventor.mit.edu
Need a google account to log in
Live testing in a connected device
Install “MIT AI2 Companion” app in the device
Connect both your computer and your device to the SAME WiFi Network
App Inventor is a cloud-based tool

4. DigitalDoodle Designer: Set the Screen so that it does not scroll
the screen’s scrollable box is unchecked
Drawing and Animation
Canvas: fill the parents

5. DigitalDoodle Blocks Designer:
Set the Screen so that it does not scroll : uncheck the screen’s scrollable
When you are using a Canvas, you have to turn off screen’s the "Scrollable" setting (UNCHECK THE BOX) so that the screen does not scroll. This will allow you to make the Canvas to fill up the whole screen.

6. Connect AI companion On PC, you will see a QR code
On your device, MIT App Inventor2 companion screen is shown with two options
Connect with code
Scan QR code
Fun to try: can your device be connected with my QR code? -- share?

7. Packaging your app
App (provide QR code): You can generate a Barcode (a QR Code), which you can use to install the app on a phone or tablet that has a camera, with the aid of a barcode scanner, like the ZXing barcode scanner (freely available in Google Play).
Note: this barcode works only for your own device because it is associated with your google account. If you want to share your app with others via barcode, you'll need to download the .apk file to your computer and use a third-party software to convert the file into a barcode.
2. App (save to my computer): You can download the app to your computer as an apk file, which you can distribute and share as you like by manually installing it on other devices.

8. HelloPurr http://appinventor.mit.edu/explore/ai2/hellopurr.html
create a button that has a picture of a cat on it, and then program the button so that when it is clicked a "meow" sound plays.

9. TalkToMe You will need: Textbox Button TextToSpeech
Designer
You will need:
Textbox
Button
TextToSpeech
AccelerometerSensor
Non-visible components

10. TalkToMe

11. BallBounce Designer Blocks Screen: uncheck scrollable
Canvas: fill parents
Ball: Radius, PaintColor
Blocks
Block editor