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    NCTM Illuminations
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    In this math activity, learners model a bungee jump using a Barbie® doll and rubber bands. The distance which the doll will fall is directly proportional to the number of rubber bands, so this...

    $1 - $5 per group Ages 11 - 18 45 to 60 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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    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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    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