81-piece gear toy encourages fun, critical thinking, and problem-solving hours. Each set comes with interlocking blocks, gears of varying sizes, a swing set, a see-saw, a merry-go-round, figurines, and more! A motorized spinning gear inspires creativity, imagination, and the learning of engineering skills for children at a young age. Unlike other building block gear sets, the Gear block comes with a built-in motor. A flick of a switch is all it takes to spin all the gears automatically without manually cranking them. Only one AA battery is required. (batteries not included) Gears Building Blocks is a great learning tool that encourages learning of mechanics and engineering, it is also an innovative toy set with 6 different colors to help children focus their learning on colors, matching, sorting, and identifying. Inspire early child development while using imagination and critical thinking to create hours of fun. It is made of safe and durable Material, Nontoxic & Smooth Edge, It comes with many small parts kids below 3 Years are should play under parents' supervision