Create the solar system with your hands.

[Poita]

This is a bit of fun using the Intel Perceptual Computing SDK.
http://youtu.be/AInGg0pu9fs

You can download the source files here and play with it, as well as the SDK runtime or the SDK itself.

http://software.intel.com/en-us/vcsource/tools/perceptual-computing-sdk/demos

Now if anyone asks what created the solar system, you can answer that you did!

[Poita]

You can also buy the kinect-like gesture recognition camera from intel as well. It is proving to be quite accurate so far, we have it recognising single finger gestures.
http://click.intel.com/intelsdk/Creative_Interactive_Gesture_Camera _Developer_Kit-P2061.aspx