Rodney Frost's collection of playful mechanical contraptions will captivate anyone who operates them - and they'll entice the creative woodworker too, because these whirligigs are as much fun to make as to maneuver. The secret to these movable marvels: propellers and other action-filled parts made from wood or metal. Full-size schematics and drawings, plus detailed written instructions, will guide woodworkers smoothly through building, carving, and assembling.