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    The Exploratorium
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    This activity provides instructions for using cornstarch and water to make an ooze which has the properties of both a solid and liquid.

    $1 - $5 per student Ages 4 - 11 10 to 30 minutes
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    Twin Cities Public Television
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    This is a quick activity (on page 2 of the PDF) about the "Tyndall effect," the scattering of visible light when it hits very small dispersed particles. Learners will shine a laser...

    $5 - $10 per group Ages 8 - 14 10 to 30 minutes