Got a dollar burning a hole in your pocket? If you want to take a break from origami butterflies and flowers, paper engineer Won Park has created this sophisticated origami kit of 10 projects with a military theme. Using the instructions in the spiral bound handbook and the 100 sheets of practice currency included in the hardback folio, you can fold a navy destroyer, submarine, stealth fighter, spy plane, hand grenade, tank, fighter jet, revolver, and a Zero fighter plane.