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Build a colorful, mechanical, rotating model of our solar system! The model uses a windup motor to set the planets in motion–no batteries required. Explore fundamental gear mechanics and discover a special type of gear called a planetary gear. Great for science fair projects, you’ll learn about the planets’ celestial orbits and tons of cool planetary facts. Includes a built-in expansion slot should the mysterious Planet Nine be discovered! Assembly time: 1-2 hours, Difficulty Level: Intermediate. WARNING: Choking hazard! Not for children under 3 years of age.
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