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Orrery - Orbiting Solar System The Arts hands-on experiments make human biologyWith the Orbiting Solar System you can set the planets in motion with a flick of your wrist! 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 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 colourful, realistic looking printed
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