Scratch 2.0 Virtual Piano demo

Scratch 2.0 (currently in Beta as of today 1/29/2013) allows the user to have virtual objects and use their webcam to interact with them.  One example of this is a virtual piano keyboard which you can play:  

See for a video showing how it can be used to play chopsticks.  
To see this demo on the Scratch web site login at, see user dalereed and the program called "Piano".