Vertically engineered, an interactive project called "Electric MoOns" produces a massive 10x10 3D physical display. The display uses 100 white balloons in a dark room to create the illusion. From Make:, "When music is played, the balloons synchronize their movements and their interiors are illuminated by dimmable super-bright LEDs". A screen-based UI allows for a user to tweak the movement and lighting of each balloon.
That is awesome!