What's a Zoetrope? It's a wheel of still images in succession that when spun produces the impression of movement, basically the origins of film and animation as we know it today. The tecnology inspired the innovators of the medium such as Eadweard Muybridge, ( but you film school kids already knew that!)
Check out the Zoetrope in motion below and for more info about the making of process see here.
Temperley London Circus Zoetrope from LEGS on Vimeo.
..and speaking of Zoetrope's and advertising, just last year Sony Bravia landed a spot in the Guiness Book of World Records for creating the largest Zoetrope. Very cool. Check it out.