Teach your child a thing or two about physics and have fun doing it! This pulley system reduces the weight of a load by four times, making it easier to lift heavy objects, up to 350 lbs. The Block and Tackle can be attached to ceilings or trees with the included textile tension belt. Made from beech wood and polypropylene rope in Germany. Designed by Horst Dwinger. Haba conforms to American (ASTM) standards for the manufacture of safe toys.