Multimedia Movie #1 "Perpetual Motion," wide shot 916K, MPG Movie #2 Close-up of "Perpetual Motion" gear 445K, MPG Need the plugin?

One day, I began thinking about gears and tooth design and meshing etc., and thought, "Why do teeth on gears have to be shaped the way the are? Why can't they be shaped like other things like figures, letters, etc.?" I drew out a gear with the word Perpetual Motion around the perimeter and made a gear that would mesh with it. I added the crank, which forwards the gear one letter at a time and thought to add a figure on top to point to each letter as it came around.