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    The Exploratorium
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    In this demonstration, learners watch as a device drops a ball into a cup without touching the ball or cup, even though the ball and cup are virtually side-by-side. Specifically, this device...

    $10 - $20 per group Ages 11 - 18 5 to 10 minutes
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    Community Science Workshop Network
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    Learners build a yo-yo using a piece of wood, PVC pipe, and string. In doing so, learners explore the force of gravity and angular momentum. This activity guide includes step-by-step instructions...

    $1 - $5 per student Ages 8 - 18 30 to 45 minutes
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    Community Science Workshop Network
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    In this activity, learners build a toy that flies in circles. This activity introduces learners to center of mass, torque, and rotational motion.

    $5 - $10 per student Ages 6 - 18 45 to 60 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners explore the concepts of equilibrium and center of mass by seeing how non-symmetrical objects balance. They balance a paper parrot cut-out on a wire coat hanger and find that their parrot...

    1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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    NASA
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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. This lesson plan includes procedures for the...

    $5 - $10 per group Ages 8 - 14 45 to 60 minutes
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    Community Science Workshop Network
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    In this activity, learners create improbable looking structures using craft sticks and bamboo skewers. The three structures that learners construct include "Dancer on the Table" (a...

    $1 - $5 per student Ages 8 - 18 30 to 45 minutes
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    Museum of Science, Boston
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    The goal of this Star Wars activity is to design and build a balancing device to help an Ewok escape the Imperial Forces by sliding down a tightrope to safety. Working in small teams, leaners work...

    $10 - $20 Ages 8 - 18 30 to 45 minutes
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    COSI
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    In this engineering activity, learners test the stability of towers they build out of cups, discovering that structures with more mass in the base are more stable.

    1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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    Astronomical Society of the Pacific
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    This fun and simple hands-on astronomy activity lets learners imagine what would happen if our Sun were replaced with a black hole. Using a bucket with stretchy fabric over it, this activity allows...

    $10 - $20 per group Ages 6 - adult 10 to 30 minutes
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    The Exploratorium
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    In this science trick, learners get an egg to stand-up on its long-axis vertical to a table's top. Learners use salt grains, which are virtually unnoticeable to viewers, to give an egg's...

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes

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