David Merrill demos some very interesting Interactive Computerized Blocks called Siftables. The above video is from the latest TED conference.

"Imagine overturning a container of nuts and bolts, then looking through the resulting pile for a particular item. Or spreading photographs out on a tabletop and then beginning to sort them into piles. During these activities we interact with large numbers of small objects at the same time, and they utilize all of our fingers and both hands together. We humans are skilled at using our hands in these ways, and can effortlessly sift and sort – focusing on our higher level goals rather than the items themselves. Siftables aims to enable people to interact with information and media in physical, natural ways that approach interactions with physical objects in our everyday lives. As an interaction platform, Siftables applies technology and methodology from wireless sensor networks to tangible user interfaces. Siftables are independent, compact devices with sensing, graphical display, and wireless communication capabilities. They can be physically manipulated as a group to interact with digital information and media. Siftables can be used to implement any number of gestural interaction languages and HCI applications. "

"MIT grad student David Merrill demos Siftables — cookie-sized, computerized tiles you can stack and shuffle in your hands. These future-toys can do math, play music, and talk to their friends, too. Is this the next thing in hands-on learning?"