Phun with physics

http://www.phun.at/

Quoting:

Phun is a Master of Science Thesis by Computing Science student Emil Ernerfeldt for supervisor Kenneth Bodin at VRLab, Umeå University.
Phun is meant to be a playground where people can be creative. It can also be used as an educational tool to learn about physics concepts such as restitution and friction.

The some of the videos at youtube are plain fun watching 🙂

http://www.youtube.com/watch?v=0H5g9VS0ENM