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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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    New Jersey Department of Education
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    Learners demonstrate how water can distort, refract and magnify light. In an investigation called Underwater Differences, learners do activities including the Broken Pencil, examining how a pencil...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours