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In this physics activity, learners will explore buoyancy.

1 cent - $1 per student Ages 4 - adult 10 to 30 minutes
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In this physics activity (page 3 of the PDF), learners will see firsthand that air takes up space and has pressure by attempting to inflate a balloon inside of a bottle.

1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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What keeps bubbles and other things, like airplanes, floating or flying in the air?

1 cent - $1 per student Ages 4 - 14 10 to 30 minutes