I used to have a kit, and maybe still do, called Swirl Art with which I could make fancy greeting cards with spun paintings made from centrifugal centrifugal force. My first kit was called an Abstracto and quite frankly, I think it was made of better quality materials.

Now I have an iPod touch and have discovered a handy app that accomplishes about the same thing and it’s called SpinArt. Here are samples made with it.