Ok the last super bowl someone setup a live video feed of a terrible towel (Pittsburgh Steelers) that was connected to a robotic arm. Every time some tweeted its #hashtag or name (i forget which one) the arm would move and display who tweeted it....

It was a cool idea because you from home could interact with an onscreen robot (small mechanical toy) and have your name show up on the live stream... does anyone know how to do this? thanks