Aleksei Stevens has created the SoundBall, a Bluetooth-powered wireless toy that controls music and sound through motion.

SoundBall - sensors in the ball send information to a computer which makes sound

Aleksei writes:

A motion sensor keeps track of whether the ball is being hit, thrown, or spun, and then sends this information via Bluetooth to a computer, where it controls sound and music.

Visit the SoundBall page to see a video of the SoundBall in action.