Lets babies mix and match and make all kinds of silly halloween characters. Images from: https://www.comofazeremcasa.net/brinquedo-com-blocos-de-madeira-para-criancas-com-moldes/

State change based on the position of draggable objects

A reverse timer using the handle to designate where the timer begins its countdown.

A simple recreation of the very popular video game Tetris. Use the buttons to move, rotate and change the block pieces. You can also use the arrows and A,B keys on your keyboard as well. Design inspired by: https://www.sketchappsources.com/free-source/3559-grdk-pro-game-system-64bit-sketch-freebie-resource.html I do not own anything related to Tetris and this is simply a very simple tribute to the creation of Alexey Pajitnov.