• 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