Check out the following all based on the 'connect the puzzle pieces' UI of App Inventor: http://appinventor.mit.edu/explore/designer-blocks.html http://appinve

Check out the following all based on the 'connect the puzzle pieces' UI of App Inventor: http://appinventor.mit.edu/explore/designer-blocks.html http://appinventor.mit.edu/explore/designer-blocks.html https://blockly-games.appspot.com/ https://blockly-games.appspot.com/ (transitions to JavaScript) http://pencilcode.net/ http://pencilcode.net/ https://www.makewonder.com/ https://www.makewonder.com/ (physical robots)