Haba Kullerbu Construction Site SetThis Kullerbu set features an awesome construction site section. In which a loader can push the ball along the track, thanks to a momentum motor, and down the construction site into the waiting dump truck. Featuring two construction vehicles, 2 balls, and a sign. This makes a great standalone set, or a great addition to any Kullerbu set. Insert, click, done assembling a play world could hardly be easier. Nothing can easily shake the Kullerb tracks