Moneygami is origami made from U.S. currency; the subtle genius lies in the way the artist incorporates the prints on the dollar bills into the facial characteristics of the finished figures. More moneygami here. Via.
Origami is a endeavor that is undertaken by many, using what's available. Often, that is money. Sometimes simple, and sometimes complicated the result is often spiffy and incorporates the bill's features into the design.
Money Art. They say it's hard to make money from art, but some people find ways to make art from money. Or at least a few accessories. (via)