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    NASA
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    In this activity, learners build models of comets, using edible materials, to learn about comets' structure. Learners then use their senses to simulate a spectrometer to analyze "comets...

    Over $20 per group Ages 6 - 18 45 to 60 minutes
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    University of Washington
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    In this activity (last activity on the page), learners make a model of the eardrum (also called the "tympanic membrane") and see how sound travels through the air. This activity page...

    1 cent - $1 per student Ages 6 - 18 5 to 10 minutes
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    WGBH
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    This fun activity uses simple materials such as milk cartons and mirrors to introduce the ideas of optics and visual perception. The project is easy to do, however adult assistance may be needed to...

    $1 - $5 per student Ages 6 - 11 10 to 30 minutes
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    Science Museum of Minnesota
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    In this activity, learners imitate the way vocal cords work by building a model from a plastic cup, rubber band, and a straw. Then learners blow through the straw onto the model, and listen to the...

    1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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    Optical Society of America
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    In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it. Learners use a shoebox, a glass of water, and colored plastic to make essentially a model...

    1 cent - $1 per student Ages 8 - 14 5 to 10 minutes

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