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In this math activity, learners observe and sketch cracking patterns in pavement.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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You may have tried to throw a curveball or a slider, or even a screwball, with an ordinary baseball and found it difficult to do.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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With little more than a plastic bottle, some vinyl tubing, and a length of PVC pipe, make a rocket and a rocket launcher and investigate how rockets fly.

1 cent - $1 per student Ages 8 - 14 30 to 45 minutes
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In this physics activity, learners conduct two experiments to explore free-falling.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners build large-scale structures and cantilevers in a series of "building out" challenges with garden poles and tape.

$10 - $20 per group Ages 6 - 14 2 to 4 hours