Created by Joelle Aeschlimann at ECAL, Little Boxes is a music box prototype created for the iPad. It consists of a tangible part composed of three separate music boxes that interact with an iPad in different ways. When placed the device, turning the lever generates the music and visual content.
Read more here: http://www.creativeapplications.net/air/little-boxes-music-box-for-the-ipad-by-joelle-aeschlimann-ecal/