Q-Tips With A Dollar
http://www.maximonline.com/articles/index.aspx?a_id=7261&src=gx125
Instead of spending it, why not play with money? Maybe it'll be fun to fly the dollar, or donate it, or maybe buy a new doorbell... I think I would make an oragami with a one dollar bill, if I was bored and didn't want to spend any money.