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In this activity (page 1 of PDF under SciGirls Activity: Pet Handedness), learners will construct a simple spinning top out of a circle of construction paper, a film canister lid, and a bamboo skewer.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners investigate how changing the center of gravity of a balloon affects how it travels. Learners fill a balloon with a little bit of water and insert into an empty balloon.

1 cent - $1 per student Ages 8 - 14 Under 5 minutes
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In this activity, learners construct cars that are powered by hand-made, electric propellers.

$5 - $10 per student Ages 8 - 18 1 to 2 hours