This is the Mechanical Kangaroo Assembly Kit from Tamiya's RoboCraft Series. For Ages 10 and Up. This amazing kangaroo robot jumps by moving its rear legs simultaneously to go forward. When walking slowly, it also uses its front legs, and when running quickly it uses its tail for balance. Everything you need is included. Body parts are transparent orange plastic. When using high-speed gearbox, the kangaroo walks standing on its rear legs and tail. Low-speed gearbox makes the kangaroo walk using its front and rear legs. Simple assembly with screws and snap-lock parts. Altering tail position makes the kangaroo change direction. Includes gearboxes and motor. A small screwdriver is included. Pictorial assembly instructions.