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    American Chemical Society
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    In this activity on page 11 of the PDF, learners follow simple steps to recycle old newspaper into new paper. Use this activity to introduce conservation as well as the chemistry of cellulose and...

    $1 - $5 per student Ages 6 - 14 1 to 7 days
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    WGBH
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    In this activity, learners create and reveal secret messages written with invisible ink! The invisible ink is actually a baking soda solution, and the magical revealing liquid is fruit juice. The...

    $1 - $5 per group Ages 6 - 11 45 to 60 minutes

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