Different every time you build, this versatile, interconnecting gear set fosters imagination and provides opportunities to experiment with simple mechanics and science Supports STEM by introducing children to sorting, grouping, counting, designing, constructing, and putting physics into play with spinning gear movement. Learning gets more intricate as children’s abilities advance Boost fine motor skills while promoting reasoning and problem solving as children create moving experiments with spinning, colorful action 100-piece set includes 46 Colorful gears (blue, green, orange, red, purple), 26 square pillars, 21 six-way axles, 6 interlocking bases, 1 crank handle, and activity guide Great for ages 3+