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Learners conduct an experiment to determine the rate at which two materials, sand and water, heat up and cool down.

$5 - $10 per group Ages 11 - 14 45 to 60 minutes
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In this simulation of natural selection, learners use binder clips in three different sizes to represent the diversity of beak sizes in a bird population.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes