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    The Exploratorium
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    In this activity, learners build a recording timer made from simple materials (e.g., small dc motor, sharpie pen, craft sticks, adding machine paper tape, etc.). The device produces a record of...

    Over $20 per group Ages 14 - 18 1 to 2 hours
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    Pratt School of Engineering, Duke University
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    Learners use engineering design principles to construct and test a fully solar-powered car. Solar car kits usually include a photovoltaic cell and motor; some include a chassis as well. Encourage...

    Over $20 per student Ages 11 - 14 2 to 4 hours