The fun starts the moment you see the 726 precision-cut pieces just begging to be assembled-and the good times never end after that. Once you build this marvelous mechanical toy, you get to steer an 8¾. helicopter or 5¾" biplane, each flight fueled by a rubber band powered motor. Completed model is 16½"x 13½"x 12¼". Wood and rubber. Ages 14+.