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In this activity, challenge learners to keep an ice cube from completely melting in 30 minutes. Learners engineer a box or wrap to prevent an ice cube from melting.

$1 - $5 per student Ages 6 - 11 30 to 45 minutes
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Learners build devices from rubber bands to test for invisible air pollutants.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes