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    PBS
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    In this activity, learners use a compass, powerful magnet, and copper magnet wire to build a special generator known as a dynamo. Learners observe what happens to the compass needle when the magnet...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    The Exploratorium
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    In this physics crime lab or demonstration, learners pretend they are criminologists and must find the "muzzle velocity" (speed of the bullet as it leaves the gun) of a gun used to commit...

    Over $20 per group Ages 14 - 18 1 to 2 hours
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    PhET
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    In this online activity, learners use a realistic mass and spring laboratory. They hang masses from springs and adjust the spring stiffness and damping. Learners can even slow time and transport...

    free Ages 8 - adult 10 to 30 minutes
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    WGBH
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    In this design challenge activity, learners build a car that can travel at least four feet using rubber band power and use the design process to debug problems. Learners can follow up this activity...

    $1 - $5 per student Ages 8 - 14 30 to 45 minutes
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    WGBH
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    In this design challenge activity, learners use a balloon and other simple materials to design an air-powered rocket that can hit a distant target. Learners are encouraged to consider how rocket...

    $1 - $5 per student Ages 8 - 14 30 to 45 minutes
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    Museum of Science and Industry, Chicago
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    Learners design and build a roller coaster using simple materials. Learners experiment with potential and kinetic energy to get a marble to follow a track into a cup.

    $1 - $5 per student Ages 8 - 14 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 how two cylinders that look the same may roll down a ramp at different rates. Learners discover that an object's acceleration rate depends partly on how its...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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    WGBH
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    In this design challenge activity follow up to "Kicking Machine", learners add a hands-free feature to their Kicking Machine. Learners modify their kicking machine to have it either...

    $5 - $10 per student Ages 8 - 14 30 to 45 minutes
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    COSI
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    In this fun and, at times, hilarious force and motion activity, learners will use household objects to build a crazy contraption and see how far they can get a tennis ball to move. This is an...

    $1 - $5 per group Ages 4 - adult 1 to 2 hours

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