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    WGBH
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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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    University of Nebraska State Museum
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    This activity (on pages 19-24) introduces learners to the rain forest's layers—emergent, canopy, understory, and forest floor—and has learners make paper lianas (vines that live attached to...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    American Chemical Society
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    In this activity, learners make film canister rocket ships. A fin pattern is glued onto the outside of the canister, and fuel (water and half an antacid tablet) is mixed inside the canister. When...

    1 cent - $1 per student Ages 4 - 14 10 to 30 minutes
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    California Academy of Sciences
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    In this activity, learners gain knowledge about how carbon moves through all four of the Earth’s major spheres (biosphere, hydrosphere, atmosphere, and lithosphere), and understand how humans...

    1 cent - $1 per group Ages 8 - 18 30 to 45 minutes
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    American Chemical Society
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    In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain. Antacid tablets made with calcium carbonate are used to represent marble (also made from...

    1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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    University of Nebraska State Museum
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    In this detailed activity (on pages 9-18), learners investigate the body parts of a parasitic ascaris worm by making and dissecting clay models. Each learner creates a model of either a male or...

    1 cent - $1 per student Ages 8 - 14 1 to 2 hours
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    University of Nebraska State Museum
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    In this "gross" activity (on pages 34-46), learners make a life-size model of a human digestive tract, and follow the life of a beef tapeworm as it makes its way through. In Part One,...

    1 cent - $1 per group Ages 8 - 14 45 to 60 minutes