Build a windmill, two-speed crane, force scale, sail car, mars robot, hammer machine, centrifuge, pinball game, centrifugal switch, ships lantern, and dozens of other models; Experiment with simple machines: gears, levers, screws, inclined planes, pulleys, wheels and axles, and learn and understand the most fundamental physics equations, reading about amazing real-world applications for physics. Learn about Physics in a fun and engaging way. 37 different experiments created with 305 parts. Size H29.5, W37, D9cm. Batteries required: 1 x C . For ages 8 years and over. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult. This toy does not provide protection. To prevent possible injury by entanglement remove this toy when the child starts trying to get up on its hands and knees into a crawling position.