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    NOAA
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    In this activity on page 27, learners perform an experiment to learn about how different types of marine debris degrade and how weather and sunlight affect the rate of degradation. Learners...

    $1 - $5 per group Ages 8 - 14 1 to 12 months
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    Lawrence Hall of Science
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    In this outdoor activity, learners release a portion of a lawn from human control—no mowing, no watering, no weeding, no pest control—and then investigate the changes that result over several weeks...

    Over $20 per group Ages 6 - 14 1 to 12 months

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