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    In this design challenge activity, learners invent a convenient way for someone using crutches or a wheelchair to carry small personal items. Learners will experience some of the obstacles people...

    $5 - $10 per group Ages 8 - 14 30 to 45 minutes
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    In this design challenge activity, learners build a machine out of cardboard that runs smoothly and dependably. Learners must be precise to make sure their component works properly. This activity...

    $1 - $5 per student Ages 8 - 14 30 to 45 minutes
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    In this invention challenge activity, learners see how many objects they can grab with a homemade "bionic" arm. Learners will follow the design process to build a grabber that can reach...

    $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 engineering activity, learners design and build a mechanical arm to lift a small item. Learners must follow certain design constraints as they build an arm that can lift a paper cup from...

    $5 - $10 per group Ages 8 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    In this engineering activity, learners examine bicycle mechanics and gear ratios. Learners determine which gears will help them bike a set course in the shortest amount of time.

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear. This lesson plan includes information...

    $5 - $10 per student Ages 8 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    In this ocean engineering activity, learners explore buoyancy and water displacement. Then, learners design models of deep sea divers that are neutrally buoyant.

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    In this engineering activity, learners design their own board games. Learners brainstorm the various components of board games, conduct research using well-known games, and then design and...

    $1 - $5 per group Ages 8 - 14 2 to 4 hours
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    Twin Cities Public Television
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    In this engineering activity, learners explore simple machines and then build cardboard automata using cams. Learners are also challenged to build a complex machine--a moving sculpture that tells a...

    $5 - $10 per group Ages 8 - 14 2 to 4 hours
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    In this design challenge activity, learners build a tower that can support a tennis ball at least 18 inches off the ground while withstanding the wind from a fan. Learners will build a sturdy frame...

    1 cent - $1 per student Ages 8 - 14 30 to 45 minutes

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