Mechanical Solar System Orrery

Build a mechanical model of the Solar System with the Sun at the center and eight planets revolving around. Wind it up and the planets will make their revolution effortlessly! Assemble this complex interlocking gear assembly to learn how the gears and winding mechanism work to turn the planets. Also discover how a special type of gear called a planetary gear is used to simulate the movement of the solar system .Explore fundamental gear mechanics; planets travel at different speeds depending on the gear ratio.

Learn the order of the planets, their relative size, speed of revolution around the sun, their appearance and other fascinating facts about each. Each planet includes colorful and realistic printed graphics. Bonus: there’s a built-in expansion slot in case the mysterious Planet Nine is discovered! Kit includes full-color, step-by-step assembly instructions.

• Wind-up motor – no batteries.
• Recommended for ages 7 and up
• 59 parts

Asssembly Instructions Video