I wanted to do something cool with motion sensing technology so I started experimenting with the Xbox Kinect. A song plays through headphones. Your left hand (up/down) controls the pitch and tempo of the music while your right hand (in every direction) controls the colors of your on-screen party avatar.
Depicted above is the first part of this project. Bubbles stem from and follow your right hand while the left hand controls various properties, including Bubble count and size.