Ants walking through IR gates manipulate the Auduino synth program. John spotted this at the RobotFest / Mid-Atlantic Mini Maker Faire. He writes -

I went to the RobotFest / Mid-Atlantic Mini Maker Faire yesterday. I saw this awesome project and thought you might like to put it on the blog. Basically it’s an ant farm with optointerrupts. When the ants walk through the lightpath, they modify the audio output. The maker’s name is Adam Franchino, and he was there with some of his classmates from the Maryland Institute College of Art (MICA) His website is adamfranchino.net.