Crayon Physics Deluxe

The Crayon Physics Deluxe must be one of the coolest touchscreen games ever. The aim is very simple: take a ball to where the start is. The tools to do it are a crayon and your imagination, since whatever you draw will automatically get recognized by the physics engine and put into motion over a piece of paper. Microsoft must buy this game and ship it with every Tablet PC. And somebody should port this to the iPhone. Pronto.

http://gizmodo.com/gadgets/cool-tablet-game/crayon-game-gets-you-back-to-kindergarten-verdict-doodlelicious-323687.php
http://www.youtube.com/watch?v=QsTqspnvAaI