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Cool off in the heat with this project! Learners use simple materials to build a fan that runs on a motor.

$5 - $10 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners try to revive wilted celery. Learners discover that plants wilt when their cells lose water through evaporation. Use this activity to introduce capillary action.

$1 - $5 per group Ages 4 - 11 4 to 24 hours