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    The Exploratorium
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    In this activity, learners build inexpensive pulley assemblies from pulley wheels used for sliding screen door replacement or from clothesline spreaders. Learners will investigate pulley behavior...

    $10 - $20 per group Ages 11 - 18 1 to 2 hours
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    Community Science Workshop Network
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    In this activity, learners build small animated toys that move. This engineering activity introduces learners to automata, simple machines, mechanical advantage, rotational motion, and cranks and...

    $1 - $5 per student Ages 6 - 14 30 to 45 minutes
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    Museum of Science, Boston
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    In this activity, learners are challenged to design and build a system of gears and kinematics to create a hand-stamping machine. In this activity, learners get a chance to design, build, and test...

    Over $20 per group Ages 8 - 18 30 to 45 minutes
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    IEEE
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    In this activity, learners explore the engineering and principles behind working elevators. Teams explore the history of elevators, elevator design, and develop their own working elevator using...

    $5 - $10 per group Ages 11 - 18 2 to 4 hours
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    IEEE
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    In this activity, learners explore trebuchet design. Teams of learners construct trebuchets from everyday materials. They then test their trebuchets to determine the farthest distance they can hit...

    $10 - $20 per group Ages 11 - 18 1 to 2 hours