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    Mount Holyoke College
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    In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch. Learners test cream of tartar, baking soda, lemon...

    $10 - $20 per student Ages 4 - 8 10 to 30 minutes
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    WGBH
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    In this activity, learners use mirrors to write secret messages to a friend. Use this activity to explore letters, optics, and/or symmetry.

    1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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    The Science House
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    In this chemistry demonstration, learners will discover that phenolphthalein is a chemical that displays different colors depending on the acidity or basicity of the environment. Learners will be...

    $5 - $10 per group Ages 6 - 18 Under 5 minutes
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    Mount Holyoke College
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    In this four-part activity, learners explore light and sound through a variety of hands-on investigations. First, learners explore sound waves and observe how sound can travel through other...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    Twin Cities Public Television
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    In this simple chemistry activity (page 1 of PDF) about acids and bases, learners will mix a baking soda and water solution and use it to paint a message on a sheet of white paper. Once the paint...

    $5 - $10 per student Ages 8 - 14 45 to 60 minutes