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    WGBH
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    In this activity, learners mix milk, vinegar, baking soda, and water to create sticky glue. Use this activity to explain how engineers develop and evaluate new materials and products. Learners...

    $1 - $5 per student Ages 6 - 11 45 to 60 minutes
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    American Chemical Society
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    In this activity on page 8 of the PDF (Behind the Scenes with Chemistry), learners make three of Harry Potter's essential school supplies: quills, ink, and color-changing paper. Learners use...

    $10 - $20 per student Ages 8 - 14 1 to 7 days

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