
Equipped with 1.5-inch screens, the Sifteo Cubes are the first interactive blocks. Each cube emits its own wireless signal, so they can “see” where the others are, and accelerometers sense when the cubes tilt, rotate, or turn upside down. From these blocks come many complex games. One, for instance, has players roll a marble around an obstacle course that reveals itself as the cubes move. Currently users can download any of 14 games, which load through a wireless link to a computer, but anyone can use the freely available open-source code to create more. $150