Crayon Physics is an awesome "game" put out by Kloonigames. It's actually in prototype right now and you can get it here: http:// Crayon Physics is an awesome "game" put out by Kloonigames. It's actually in prototype right now and you can get it here: http://www.kloonigames.com/blog/games/crayon/

Some of the solutions I've seen "cheat" by taking advantage of some flaws in the prototype. That is, you can draw lines inside other objects and they "pop-out". The solutions presented here use only the laws of real-world physics.
Enjoy.
Chris. (less info)