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    Science Friday
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    In this activity, learners make water-walking critters using thin wire, and then test how many paper clips these critters can carry without sinking. Watch the Science Friday video "Stroke of...

    $5 - $10 per group Ages 11 - 14 10 to 30 minutes
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    American Chemical Society
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    In this activity on page 7 of the PDF, learners separate materials based on their special properties to mimic the way recyclables are sorted at recycling centers. Learners observe if various...

    $1 - $5 per student Ages 6 - 11 10 to 30 minutes