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Learners act as engineers and design mini submarines that move in the water like real submarines.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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Learners shred used paper, add water, and blend it into pulp. They then strain and roll the pulp out to make new paper.

$5 - $10 per group Ages 8 - 18 4 to 24 hours