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In this physics activity, learners explore how sound is created by vibrations.

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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In this combination chemistry and physics activity, learners explore water absorption in dried beans or peas and learn how this affects their physical properties.

$1 - $5 per student Ages 6 - 11 1 to 7 days
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In this chemistry activity, learners explore chemical reactions and their effects, including the kind of reaction in the human body that makes people burp!

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this physics activity (page 12 of the PDF), learners explore potential and kinetic energy by rolling different sized marbles down an inclined plane.

$1 - $5 per group Ages 4 - 14 10 to 30 minutes