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In this activity, learners explore how acids can dissolve eggshells leaving behind a membrane-covered bouncy egg.

1 cent - $1 per student Ages 6 - 14 1 to 7 days
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In this activity, learners create their own experiment and test which of 4 mixtures of household chemicals turn pennies green over 5 days.

$5 - $10 per group Ages 8 - 14 1 to 7 days