http://code.org/learn

http://www.codecademy.com

http://www.appinventor.org/content/howDoYou/eventHandling

http://www.kodugamelab.com/bbc-microbit/

Scratch Jr emulator for a Windows computer.

http://cdn.bluestacks.com/downloads/2.2.21.6212/BlueStacks2_native.exe