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    American Chemical Society
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    In this activity learners compare the bounciness of warm and cold racquetballs to see if temperature makes a difference in how well they bounce. Use this activity to introduce polymers and...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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    Lunar and Planetary Institute
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    In this activity, learners predict whether a ball on Earth or a ball on the Moon bounces higher when dropped and why. They simulate the experiment by dropping high- and regular-bounce balls from...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    WGBH
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    In this design challenge activity, learners invent a way to send a Ping-Pong ball flying high enough to catch it - like football with a twist! Learners use paint stirrers, a wooden spool, tape, and...

    $1 - $5 per student Ages 8 - 14 30 to 45 minutes
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    Twin Cities Public Television
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    In this activity (page 1 of the PDF), learners will stand twelve feet apart swinging a rope at the slowest tempo possible while someone uses a stopwatch to record the number of twirls per minute....

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF) is a full inquiry-based challenge related to motion and design optimization. Groups of learners will use construction paper to build a model bobsled run for a...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    Twin Cities Public Television
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    In this sports-themed engineering activity, learners create super bouncy balls out of balloons. Learners brainstorm, test their designs, and share results.

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    Lunar and Planetary Institute
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    In this activity, learners make models representing bones on Earth and bones that have been in space. They discover what happens to bones without proper exercise and nutrition. This activity...

    $1 - $5 per student Ages 8 - 14 5 to 10 minutes
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    The Exploratorium
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    This trick from Exploratorium physicist Paul Doherty lets you add together the bounces of two balls and send one ball flying. When we tried this trick on the Exploratorium's exhibit floor, we...

    $1 - $5 per group Ages 11 - adult 10 to 30 minutes
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    NSBRI
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    In this activity about physical stress (page 28 of PDF), learners discover that muscles and bones need to work to stay strong. In part 1, learners investigate how physical stress can affect bone (a...

    $1 - $5 per group Ages 6 - 11 1 to 4 weeks
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    4-H
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    In this engineering/design activity, learners make a kite, fly it, and then work to improve the design. Learners explore how their kite design variations affect flight. Learners can test their kite...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes

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