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    American Chemical Society
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    In this activity, learners write invisible messages on goldenrod paper, and make the message appear and disappear using acids and bases. Goldenrod paper is paper that has been dyed with natural...

    1 cent - $1 per student Ages 6 - 14 30 to 45 minutes
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    American Chemical Society
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    In this experiment, learners try different liquids to see which ones clean pennies best. Liquids to try include water, lemon juice, cola, vinegar, and dishwashing detergent. Suggested extensions...

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes
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    American Chemical Society
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    Learners mix vinegar and baking soda to produce a gas. With the addition of a bit of liquid soap, the gas becomes trapped in measurable bubbles. This way, learners can alter the amount of...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    American Chemical Society
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    Learners add calcium chloride to a baking soda solution and observe an increase in temperature along with the production of a gas and a white precipitate. These are all signs of a chemical reaction...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    American Chemical Society
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    In this activity on page 2 of the PDF, learners conduct chemical tests on certain powders used in cooking. After completing the tests, learners try to figure out the identity of a mystery powder....

    $10 - $20 per student Ages 8 - 14 45 to 60 minutes