The rear excavator can only be used when stationary with support leg down, the seat and arm can turn through 180 degrees, the control levers allow it to raise and lower scoop and tip material just like the real thing. The excavator arm is move clockwise to 90 degrees to allow the support leg to rise enabling the tractor to move forwards or backwards. It is then locked in this position until the support leg is lowered again. Attaches to rear coupling point of the tractor with supplied clip pin and has a coupling point at its rear to attach a trailer (four wheeled types recommended). Fits all Rolly tractors (excpet Minitracs). Suitable for ages 3 plus.