Orbiting Solar System Retro This fantastic

This fantastic

Once you've found your next target

backed with Switzerland

demonstrating how the same mechanical parts can come together to yield many different results

Gyroscopic force is a fascinating and magical phenomenon

Orbiting Solar System Retro This fantasticSet the planets in motion with a flick of your wrist! Build a mechanical model of the solar system including the sun and eight planets, wind it up, and watch the planets revolve around the sun. Assemble this complex machine using snap together plastic parts to learn how the gears and wind up mechanism work to spin the model. Detail each planet with colorful, realistic looking printed planet graphics. Learn about the order of the planets, their