The iPad Pixelator by Craftster user Allerian is neat. It’s made of glued-together plastic ice cubes from Hasbro’s “Don’t Break The Ice” game.
He writes:
This mesmerizing video shows you how your iPad can easily become a party machine!
I think it would look great mounted on a wall during this hypothetical party, running an app that generates graphics that respond to sound.
This is a cute small scale version of a pixelator! Here’s a larger scale pixelator that was installed on NYC subway ads back in 2007:
http://jasoneppink.com/pixelator/