Danielle Wilde has devised this simple, yet fabulous wearable interface, the hipDisk. I met Danielle at OZCHI2008 in Cairns. The hipDisk consists of two disks that you wear above and below your waist. An array of soft switches is positioned on the perimeter of each disk. A sound is generated when two switches touch. The disks exaggerate and make visible the changing relationships between the torso and the hip in motion. Cap it off with an Esther Williams-style bathers and swimming cap, multiply the number of performers, and you get this wacky musical ensemble playing The Girl from Ipanema.

http://www.daniellewilde.com/iWeb/daniellewilde/hipdisk.html