University of Pennsylvania's General Robotics, Automation, Sensing and Perception (GRASP) Lab has a cool video of Quadrotor robotic copters playing various instruments to the tune of the James Bond Theme Song! To accomplish this the quadrotors have little reflectors and room has infrared lights and cameras to track their movements. The tracking information is then relayed wirelessly back to the quadrotors to help time and position them. So in essence the entire room and the quadrotors are the robot. Enjoy the video!