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    Association of Zoos and Aquariums
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    In this activity, learners discover how landfills affect the natural environment. By observing a 2-liter bottle filled with household garbage over a month, learners can estimate how long it takes...

    free Ages 8 - 18 1 to 4 weeks
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    The Exploratorium
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    In this long-term activity, learners make a home for a colorful community of microorganisms. Over the course of several weeks or more, learners will see colors appear and shift as the microbial...

    $5 - $10 per student Ages 8 - 18 1 to 4 weeks

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