| Meshing gears in 3 sizes plus various innovative accessories provide the most complete demonstration of basic gear mechanics available in the market. Three main features: Crank, rod and straight gear show how spinning motion is transformed into linear motion. Special bolts allow gears to overlap and multiply the speed like a car's gearbox. A chain, that can be assembled in various lengths, shows how to transmit motion between distant gears. This 140 piece set will provide unlimited hours of building fun, discovery and experimentation to budding engineers. Ages 6+. |