Inspired by the designs of Leonardo da Vinci in the 15th century, this modern interpretation of one of the world¿s most imaginative flying machines (the ornithopter) flies free as far as 100 yards. Unlike classic ornithopters that were wound by hand, this one is easily filled with compressed air with the included hand pump. Upon release, it swoops and circling like a living bird under the impressive power of its 31¿ wingspan. Simply pump up the ornithopter about 50 to 60 times and let it fly¿there¿s no need for batteries or electrical cords, so the aeronautical fun can last all day without interruption. A safety valve on the ornithopter prevents over-pumping. Ages 8 and up. 6¿ H x 26¿ W x 6¿ L. (2 lbs.)