Is it a plane or a train? This fun propeller Engine combines elements of both types of transport for a novel play experience. With mechanical movement forwards and backwards as well as the ability to be placed in neutral for free play, children will have the opportunity to develop an understanding of scientific concepts such as energy and motion. Requires 2 x AAA batteries, not included. Made of wood and plastic . Measures 5 H x 12.5 W x 3.5cm D. Features Compatible with all major wooden railway systems.