Blue Ball Machine
Behold the magic of the Blue Ball Machine. Watch the tiny blue balls make their way around the huge machine. And the music that goes along with it is perfect. Rube Goldberg would be very pleased. I could watch it for hours.
The image is actually an animated GIF (2.4MB), and it is tiled so that balls that fall off the left side appear on the right, and bottom to top as well. Amazing.
Via Anne's equally amazing Amplesanity.