Article number: TH550037
Availability: In stock (3)

Build a mechanical model of the solar system including
the sun and eight planets (also known as an orrery),
wind it up, and watch the planets revolve around the
sun. Assemble using snap-together plastic parts to learn
how the gears and wind-up mechanism work to spin
the model. Detail each planet with colorful, realisticlooking printed planet graphics. Discover how a special
type of gear called a planetary gear is used to simulate
the mesmerizing motion of the solar system. Learn
about the order of the planets, their relative sizes, their
rates of revolution around the sun, and other
planetary facts. Bonus: There’s a built-in
expansion slot in case the mysterious Planet
Nine is discovered! This kit includes
full-color step-by-step illustrated
assembly instructions.

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