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Learners will compare the growth rate and appearance of crystals forming on small rocks to those growing on miscellaneous objects. Learners will also investigate how temperature (warm vs.

$1 - $5 per group Ages 8 - 14 1 to 7 days
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In this math lesson, learners estimate distances between landmarks and use a map and scales to determine the actual distances.

Over $20 per group Ages 8 - 11 1 to 2 hours