The project above is the brain-child of SparkFun customer Brian. Aptly named "The Galactivation Station" (with the clever tagline, "Are you ready to get Galactivated?"), this installation is a 12' tall pyramid which translates your sweet dance moves into music, light, and color.
How does it do this? Well, it has four outwardly facing ultrasonic sensors which are linked into Arduino boards. The Arduino boards control some hacked synthesizers which create light effects that pulse in time with the sound. The result is the above video - pretty dang cool. Nice work Brian! For more information, visit this website.