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    Sciencenter
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    In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors. Using vinegar, washing soda, and Bogen universal indicator, the goal is to...

    Over $20 per group Ages 4 - 14 10 to 30 minutes
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    American Chemical Society
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    In this activity, learners cut out a fish and then "paint" it using universal indicator and acids and bases. The initial coat of indicator changes the color of the paper (it will turn a...

    $1 - $5 per student Ages 4 - 14 10 to 30 minutes