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    Oregon Museum of Science and Industry
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    Learners write or draw with white crayon on white paper. They look and feel to detect their marks on the paper. Then, learners paint over their paper with watercolor paint. The paint wets the paper...

    $1 - $5 per group Ages 4 - 14 Under 5 minutes
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    Mount Holyoke College
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    This activity teaches combustion as the interaction of a fuel source and oxygen. A burning candle is observed, then extinguished—first by a glass cup placed over it to cut off the oxygen supply,...

    $1 - $5 per student Ages 4 - 8 5 to 10 minutes
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    American Chemical Society
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    In this activity, learners create secret messages using a candle. Learners discover that watercolor paint is attracted to some materials, like paper fibers, but not others, like oil.

    $1 - $5 per group Ages 4 - 11 10 to 30 minutes