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    The Exploratorium
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    Learn about chemical reactions by making a Bubble Bomb, a plastic bag you can pop with the power of fizz. The bubbles in the Bubble Bomb are filled with carbon dioxide, a gas that forms when...

    1 cent - $1 per student Ages 4 - 11 10 to 30 minutes
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    Twin Cities Public Television
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    In this activity (page 2 of PDF under GPS: Kinetic Sculpture Challenge Activity), learners will predict which objects have to overcome the most static friction to slide down a ramp. Learners then...

    free Ages 8 - 14 30 to 45 minutes