Money Folding is the folding of paper money, usually US dollar bills, although anything could be used. Play money is also used, usually for practicing or for big quantities.
It generally takes advantage of the proportions of the paper and may or may not take the printed design into account.
Gallery of dollar bill models, including a 360 degree VR of one. Illustrations with videos on how to make a catapult. Also, information on Chinese money folds. http://www.wgn.net/~nienhuis/