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    The Exploratorium
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    In this activity, learners build bridges and cantilevers in a series of "building out" challenges with straws and pins. In doing so, learners will experience many of the basic physics and...

    $1 - $5 per group Ages 4 - 14 1 to 2 hours
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    The Exploratorium
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    This activity shows you how to make amazing crystal spikes using Epsom salt and the sun. When Epsom salt is dissolved in water and placed in a container in the sun, the water evaporates, leaving...

    $1 - $5 per student Ages 6 - 11 1 to 2 hours

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