Fully automatic, see-through pump lends him a helping hand, letting him track his growth as 3 ascending levels of suction power take care of the "hard" work. With a flanged base for a secure seal, this high-tech tool is totally self-contained and wireless. Textured controller and measured cylinder offer a safe, non-slip grip with a quick-release air valve for when he's reached his full potential. Requires 3 AAA batteries (not included). 7 1/2" L x 2 1/4" dia.