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In this activity, learners examine baking powder, a combination of three powders: baking soda, cream of tartar, and cornstarch.

1 cent - $1 per group Ages 6 - 14 30 to 45 minutes

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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