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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 use aluminum trays and wooden blocks to form stream tables to investigate river formations in two different landscape scenarios.

$10 - $20 per group Ages 11 - 14 45 to 60 minutes