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    American Chemical Society
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    In this activity, learners investigate why apples turn brown. Learners discover that lemon juice interferes with the reaction that causes the browning.

    $1 - $5 per group Ages 4 - 11 2 to 4 hours
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    NASA
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    In this activity, learners test the rate of ripening fruit and vegetables and use a chemical to inhibit the ripening process. After the experiment, learners measure the exposed surface area of the...

    $10 - $20 per group Ages 8 - 14 1 to 2 hours
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    The Exploratorium
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    In this activity, learners cook amino acids and sugar to explore the range of aromas released. When amino acids and sugars are heated, learners will observe a phenomenon known as the Maillard...

    $10 - $20 per group Ages 6 - 14 Under 5 minutes