What are Siftables?

Siftables are cookie-sized computers with motion sensing, neighbor detection, graphical display, and wireless communication. They act in concert to form a single interface: users physically manipulate them - piling, grouping, sorting - to interact with digital information and media. Siftables provides a new platform on which to implement tangible, visual and mobile applications.

Make sure to watch the video on this site:  http://siftables.com/

Another site discussing Siftables:  http://web.media.mit.edu/~dmerrill/siftables.html