John Witham and Karen Pitman are the creators of a Musi-Graphic Hyperinstrument using external VR or Mandala System. The system is a big hit at Austin schools, raves, and RoboFests. Below is a video grab of a screen shot of kids interacting with virtual objects.

The history behind the Mandala System is pretty interesting reading. This project began as the VENUS project, and has always been the most popular interactive attraction at our RoboFest events.