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In this design challenge activity, learners build a machine out of cardboard that runs smoothly and dependably. Learners must be precise to make sure their component works properly.

$1 - $5 per student Ages 8 - 14 30 to 45 minutes
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In this health activity, learners create a device so that they not only feel their heartbeat, but also see it, using a straw and some clay.

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes