This is probably the cutest/coolest thing I've seen on a network television website in a while: free papercraft cartoon characters for kids, including Leonardo from the Teenage Mutant Ninja Turtles, shown flayed above and assembled at left (the rest of the TMNT gang is there, too). Download the PDF, print, cut, and assemble, then blow spitballs at it from across your cubicle.
Link (thanks, Jolon Bankey!)