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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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    Sciencenter
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    In this challenge, learners have to figure out in what order to combine five solutions to change the color from clear, to yellow, to blue, and back to clear. The five chemicals are potassium iodide...

    Over $20 per group Ages 4 - 14 10 to 30 minutes
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    Sciencenter
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    In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain. With this understanding, they try to find a combination of chemicals that could be used to...

    $10 - $20 per group Ages 4 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this activity, learners explore two properties of gases: gases take up space and exert pressure. Learners assemble two flasks and a beaker, connecting them with stoppers and tubing. They combine...

    $5 - $10 per group Ages 11 - adult Under 5 minutes
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    Oregon Museum of Science and Industry
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    Learners combine hydrogen peroxide with three different forms of potato: raw chunks, ground chunks, and boiled chunks. They observe the difference in bubbling of the three forms, and inferring the...

    $1 - $5 per group Ages 11 - adult 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    In this investigation of reaction kinetics, learners alter the amount of iodate solution mixed with the same amount of starch solution. Visitors observe the solutions to see which concentration of...

    $1 - $5 per group Ages 14 - adult 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners write their initials by applying different clear "magic ink" solutions to separate pieces of paper and then "develop" the inks with other clear solutions. One "...

    $1 - $5 per group Ages 14 - adult Under 5 minutes