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    NASA
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    In this Engineering Design Challenge activity, learners will use balloons to investigate how a multi-stage rocket, like that used in the Interstellar Boundary Explorer (IBEX) mission, can propel a...

    $1 - $5 per student Ages 8 - adult 10 to 30 minutes
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    University of California Museum of Paleontology
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    Learners explore the physical properties of a variety of balls and how they bounce. The point of the activity is not necessarily to have students arrive at a precise explanation for the phenomena...

    $1 - $5 per group Ages 11 - 18 30 to 45 minutes
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    The Exploratorium
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    In this activity, learners build a recording timer made from simple materials (e.g., small dc motor, sharpie pen, craft sticks, adding machine paper tape, etc.). The device produces a record of...

    Over $20 per group Ages 14 - 18 1 to 2 hours
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    Oregon Museum of Science and Industry
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    Learners observe and compare the sizes of three toy “growing” crocodiles made from water-absorbent polymers. One is it its original state, dry, hard, and about 10cm long. One is immersed in salt...

    $5 - $10 per group Ages 6 - adult 1 to 7 days
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    University of Washington
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    In this activity (26th on the page), learners construct an easy-to-build device and test motor learning. Learners can build the mazes or use pre-built mazes to measure the time it takes to loop the...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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    WGBH
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    In this design challenge activity, learners build a rubber band-powered rover that can scramble across the room. Learners follow the engineering design process to design and build a rover out of...

    1 cent - $1 per student Ages 11 - 18 30 to 45 minutes
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    The Exploratorium
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    In this activity, learners explore electronics and motion by making a Scribbling Machine, a motorized contraption that moves in unusual ways and leaves a mark to trace its path. It’s made from...

    $5 - $10 per group Ages 11 - adult 1 to 2 hours
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    University of Washington
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    In this activity, learners investigate visual perception as well as plan and conduct their own experiments. In "CLASS EXPERIMENT," learners discover how depth perception works by testing...

    1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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    The Exploratorium
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    Cardboard Automata are a playful way to explore simple machine elements while creating a mechanical sculpture. This activity was inspired by the Cabaret Mechanical Theatre, a group of automata...

    $5 - $10 per student Ages 8 - adult 1 to 2 hours
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    Community Science Workshop Network
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    Learners build a yo-yo using a piece of wood, PVC pipe, and string. In doing so, learners explore the force of gravity and angular momentum. This activity guide includes step-by-step instructions...

    $1 - $5 per student Ages 8 - 18 30 to 45 minutes

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