I while back I was thinking about Origami, and the limits of working in three dimensions.
I realized that if you start with a rigid piece of paper, and fold it back on itself, this can create a layered buffer of paper that can be tapped or stored. So, a rigid sheet can be converted into one of virtually limitless elasticity. That means any form that is possible within traditional sculpture (clay, metal, etc) can be built from a single sheet of uncut lamina.
I ran across work by origami artist Joel Cooper that demonstrates this potential on an amazing level.
From Joel Cooper:
From Joel Cooper: http://www.flickr.com/photos/origamijoel/sets/72157606262466165/