Budding young engineers will love building and tinkering with their own twisting, turning basic machines made using this STEM construction toy set. Gears! Gears! Gears! is a construction toy that offers kids open-ended building and imaginative play opportunities that allow them to express their creativity. Children can use the included STEM building guide and create their own unique basic machines. Building and playing with the Gears! range encourages critical thinking and spatial reasoning, boosts fine motor skills, and encourages problem-solving skills. This 108-piece building set includes all-new special tread components for designing and building robots, cars, and machines that move like tanks and conveyor belts. Compatible with all other Gears! Gears! Gears! sets.