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Cookie Surface Area

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This is an activity (on page 2 of the PDF under Surface Area Activity) about surface area to volume ratio.
$10 - $20 per group Ages 8 - 14 30 to 45 minutes

Size and Scale: Probing and Predicting

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In this quick activity about predicting (located on page 2 of the PDF under Where's Nano?
$1 - $5 per group Ages 8 - 14 10 to 30 minutes