Phun - Science software free download

Phun is a program that can make a subject such as science extremely fun.  First you load up a scene such as gravity, fountain, gears, catapults etc... you then play the simulation and interact with it such as move the objects around or take away gravity.  You can even set up your own experiment from scratch.

The software is free to download and well worth a look.

http://www.phunland.com/wiki/Home