Scientist in the Flying Machine Arena, a test ground at the Swiss Federal Institute of Technology [ETH], seems to have lot of fun with those quadrotor autonomous flying machines. As a matter of fact, their latest achievement is to put such a quadrotor to do some juggling staff with a ping pong ball. The ball is thrown in the air, and the quadrotor follows it all the time. When the ball falls, it bounces on the quadrotor's top! Read the original article here.