One Christmas (maybe 1990 or '91?), I got a 'cool things for kids to do' book, and spent several of the awkward hours at the uncomfortable side of the family's gathering trying to follow the step-by-step directions and perfecting the dollar bill ring.
These dollar bill origami projects are a lot cooler than that.
Booooom highlights some seriously awesome projects from this DeviantArt gallery.
Click the link above or see more at Booooom