Dickie Toys Air Pump Action Mobile Crane Truck, 12" At Dickie Toys you'll find the Air Pump Mobile Crane, a detailed scale version of the famous MAN construction vehicle The boom is operated by Dickie Toys' patented air pump system Simply by pushing the knob in the driver's cabin and operating a lever, the arm can be made to go in and out The winch can also be rolled in and out This toy vehicle doesn't need any batteries and also has the advantage of training children's motor skills with its clever, pneumatic technology