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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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    In this health and fitness activity, learners focus on the importance of daily physical activity, specifically walking. Learners use a simple method to measure their stride lengths and then...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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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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    Computer Science Unplugged
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    This activity about cryptographic techniques illustrates how to accomplish a simple, but nevertheless seemingly impossible task—making a fair, random choice by flipping a coin between two people...

    $1 - $5 per group Ages 8 - 18 30 to 45 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 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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    Association of Zoos and Aquariums
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    Did you know that a bullfrog can jump a distance of 10 times its body length? Learn more about nature's most acrobatic amphibian, the frog, through this set of short, hands-on activities....

    $1 - $5 per group Ages 4 - 18 30 to 45 minutes
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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