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In this activity, learners build inexpensive pulley assemblies from pulley wheels used for sliding screen door replacement or from clothesline spreaders.

$10 - $20 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners explore motion and airflow by setting two aluminum cans on their side and blowing air in-between them.

1 cent - $1 per student Ages 8 - 18 Under 5 minutes