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    New York Hall of Science
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    Build a catapult that transforms the potential energy of a twisted rubber band into kinetic energy. Experiment with design variations so that you can hit a target with a projectile. <b>...

    1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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    New York Hall of Science
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    In this activity, learners explore reaction time and challenge themselves to improve their coordination. Do you want to move faster? Catch that ball that you never seem to see in time? Use a simple...

    1 cent - $1 per student Ages 4 - 14 5 to 10 minutes