Internet Explorer? I mostly use Chrome, but when I access my company's internal website I have to use Internet Explorer. I think version 10 was the most recent for Windows 7.

http://gcompris.net/

My wife, who is an engineer, said, "I would go piddle, although boys would have better directional control."

It is not programming, but Phun is a good 2-D physics simulator for kids.

Another that takes a bit more work is Google's Sketchup with the SketchyPhysics plugin.

Actually, they are inertial dampers.

Wet towels are used for dampening.