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In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this activity, learners play a game to simulate the food chain.

$1 - $5 per group Ages 6 - 11 10 to 30 minutes
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In this activity, learners model a population of deer and see how the number of deer changes over time.

free Ages 11 - 18 10 to 30 minutes