3D interface demo playing 3D tic tac toe (against myself).
Ingredients: cardboard, aluminum, wires, 6 resistors, Arduino, Processing.
Make one for yourself: http://www.instructables.com/id/DIY-3D-Controller/
Instructions for turning a mug of tea into a Theremin:
1 Prepare some tea
2 Expose the L/R leads on an 1/8" cable
3 Immerse leads in tea
4 Plug cable into audio input
5 Start up max/pd/processing/etc.…