Take a look at the sandbox of the Physics Sandbox game. You are given empty space and a large selection of different materials with which you can experiment, testing the laws of physics in practice. Pour in water, throw in rocks, pour in mountains of sand, add hot lava, release gas. Watch how materials interact with each other. Sand melts into glass, water evaporates from lava fire, rocks break fragile materials, and gas causes everything around to change in Physics Sandbox.
