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In this activity on page 2 of the PDF, learners discover how color changes can help scientists distinguish between acids and bases.

$10 - $20 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners test the pH of safe liquids available at home by creating a pH indicator from mashed blueberries.

$10 - $20 per group Ages 6 - 18 10 to 30 minutes