I was browsing the excellent Bad Science Blog and I came across this post about Phun, a “2D physics sandbox”. The idea will be familiar to anyone who’s played Crayon Physics – you draw shapes, which then become solid and interact according to the Laws Of The Universe. Phun is much, much more powerful though… watch the video and you’ll see the kind of stuff you can do. And then download it. That part’s important.
that is pretty fucking amzing