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, UmeƄ 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 [...]