5 years & up. Explore basic mechanical engineering concepts through interactive storytelling and creative building. Follow along in the beautifully illustrated 32-page storybook and learn to build a series of adorable, motorized robotic animals. Storybook features instructions to create eight different functioning models, including: a polar bear, cat, narwhal, crab, fox, baby llama, unicorn, and sea otter. Each model is easy to assemble and powered by a battery-powered motor. Requires 2 AA batteries (not included). Included: 146 Building pieces and a colorful, 32-Page storybook manual.