Remember Robocup? Meet the newest contender.
The Eco-Be, which measures less than one square inch, features a motor unit adapted from tiny watch motors. With a lithium battery, small LED and microprocessor on board, the robot can move forward and backward, as well as turn around.
It can be remotely controlled via a built-in infrared module. Each robot unit has a unique address, allowing multiple robots to be controlled independently and play simultaneously.|link|