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Chew that Gum

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In this quick activity (page 1 of PDF under SciGirls Activity: Exercise and Memory), learners will investigate what happens to bubble gum when it is chewed for 5-10 minutes.
$1 - $5 per group Ages 8 - 14 10 to 30 minutes

Pea Brain!: Explorations in Estimation

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In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.
$1 - $5 per group Ages 8 - 14 45 to 60 minutes