Makey Makey
https://www.youtube.com/watch?v=rfQqh7iCcOU - intro
http://www.flashflashrevolution.com/FFR_the_Game.php -arrow game
https://scratch.mit.edu/projects/10016238/ - pacman
https://apps.makeymakey.com/piano/ - piano
https://www.primarygames.com/science/insects/games/ladybugs/ - ladybug maze
https://apps.makeymakey.com/bongos/