I’ve always loved kaleidoscopes. Here are a couple made by using Inkscape’s Tiled Clone dialog with hand animation. The animation is done with SMIL rather than JavaScript. The animations work in Chrome, Opera, and Firefox (although the performance of the latter is a bit poor). They will not work in IE as it does not (and never will according to the IE developers) support SMIL animation. (Why SMIL? It is easier to do simple animations and doesn’t get disabled by browsers due to security concerns.)
Clicking on the kaleidoscopes will take you to a larger version.
I’ve disabled the animation here as they eat too many CPU cycles. Click on images to go to full animated versions.