Darren pointed out a YouTube video of a demonstration of a whiteboard-interfaces physics drawing program that allows you to create scenes, and apply forces. When he showed me I couldn’t wait to show him this cool program that I have on my Tablet PC called “Microsoft Physics Illustrator for Tablet PC!“.
I actually saw it a few years ago as I was looking over Andrew Coates shoulder (I think) at a Melbourne .NET User Group meeting. It is pretty cool stuff. I think back then it was straight out of Microsoft Research.