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In this activity, learners explore how ordinary marshmallows expand when heated in a microwave.

$1 - $5 per group Ages 6 - 14 Under 5 minutes
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In this hands-on activity, learners use heat to shrink samples of polystyrene plastic (#6 recycle code). Learners compare the size and shape of the plastic pieces before and after shrinking.

1 cent - $1 per group Ages 6 - adult Under 5 minutes