In physics you have to experiment a lot in order to understand, at least at the basic levels. For kids there is this game so they can like more this domain, but also to have better visual representations of different principles in physics. An awesome game mostly for those who are in love with physics, but can still be fantastic to anybody else.
You must create and place different objects then you have to apply different forces. The game gives the user a chance to explore physical aspects such as elasticity, friction, inertia, gravity and density in a virtual sandbox.
View calculations, view solutions, understand why some things are happening after you apply some forces.
Certainly, you need to have first hand experience with this game.
Phun is licensed as freeware for PC or laptop with Windows 32 bit and 64 bit operating system. It is in educational category and is available to all software users as a free download.