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Learners explore water's property of cohesion through two investigations.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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In this chemistry activity, learners explore the amount of copper in a new penny. Learners use toilet bowl cleaner to hollow out the interior of a penny with zinc inside.

$1 - $5 per student Ages 11 - 18 1 to 7 days