I think this is a slightly dated toy from internet guru zefrank (there's an updated version on his site which I'm less crazy about), but what a time waster! Simply drag the shapes into your canvas, and watch how they look in a kaleidoscope. It's a lot more fun than it sounds (to me, at least).
Anyway, since I've got the word kaleidoscope up here, I decided to look up the origins on wikipedia, and this is what I came up with:
"Known to the ancient Greeks, it was reinvented by the Scot Sir David Brewster... READ ON