Dr. Masaaki Kumagai is the director of the Robot Development Engineering Laboratory at Tohoku Gakuin University, in Japan.
Along with student Takaya Ochia, Dr. Masaaki Kumagai built the robots you see in the video above. Using 3 omnidirectional wheels, each robot can work independently or in unison with the other robots.
Because it uses omnidirectional wheels, the robot can turn and move in any direction. The robots also can be pushed or bumped and still maintain perfect balance. This amazing feat of balance is accomplished by using both gyros and accelerometers. Watch the robots balance a 10 kg cinder block in the video above.