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In this activity, learners calculate the percentage of oxygen in the atmosphere by using steel wool's ability to rust.

1 cent - $1 per student Ages 11 - 18 1 to 7 days
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In this activity, learners build small indoor paper rockets, determine their flight stability, and launch them by blowing air through a drinking straw.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.

$10 - $20 per group Ages 11 - 18 10 to 30 minutes