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    Make
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    Agriculturalists have long considered mushroom growing a challenge, largely because you need a piece of benchtop equipment known as a laminar flow hood. In this activity, learners make their own ...

    Over $20 per group Ages 11 - adult 1 to 4 weeks
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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