Retired DJs take note-there's a use for your old turntables after all!
Just attach some arms like you see in the video, lock a sharpie in place, then trip out on the spirographic artwork that the turntables create-all by themselves!
It looks all geometrical and neat, and the soothing sound of the pen dancing across the paper is enough to calm even the most rabid raver. Just don't try scratching when the tables are doing there thing, or you'll end up with a big old mess!
--via Booooooom!
Update 4/16/12: Drawing Apparatus is the name of the machine, made by Robert Howsare - Thanks Robert!