This is Siren, a sound art/performance installation by British artist Ray Lee. For a great idea of how cool it looks and sounds watch this video.

Children's Choice Awards, awards handed out by a group of elementary school kids from Surrey. They get ferried around to all the performances and sure enough, they turned up at Siren. The kids enjoyed almost getting their heads lopped off by whirling loudspeakers, bobbing around to distort the sound and pulsing their fingers over their ears. I think this one was a hit.

The last performances of Siren are on January 24th at 4, 7 and 8:30.