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    Science Museum of Minnesota
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    Use grape juice, baking soda, water and vinegar to make acid and base indicator paper! This activity contains a recipe and instructions for the indicator paper. Once made, you can see the indicator...

    1 cent - $1 per student Ages 4 - 11 10 to 30 minutes
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    The Exploratorium
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    Learn about chemical reactions by making a Bubble Bomb, a plastic bag you can pop with the power of fizz. The bubbles in the Bubble Bomb are filled with carbon dioxide, a gas that forms when...

    1 cent - $1 per student Ages 4 - 11 10 to 30 minutes
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    American Chemical Society
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    In this activity, learners examine baking powder, a combination of three powders: baking soda, cream of tartar, and cornstarch. Learners use their data from the previous activity (see related...

    1 cent - $1 per group Ages 6 - 14 30 to 45 minutes
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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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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In this demonstration, learners observe vinegar and baking soda creating carbon dioxide (CO2) in a bottle. The gas is poured out of a bottle onto a candle flame, putting out the candle. This...

    1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas. The CO2 gas is trapped in a balloon, then blown through a straw into water with an acid...

    1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners test two jars, one containing plain air and one containing carbon dioxide gas, to see their reactions to temperature changes. After being left in the sun for a period of time, learners...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes