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Kicking Machine

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In this design challenge activity, learners build a machine that kicks a Ping-Pong ball into a cup lying on its side 12 inches away.
$5 - $10 per student Ages 8 - 14 30 to 45 minutes

Afterimage

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In this optics activity, learners investigate afterimages.
1 cent - $1 per student Ages 6 - 11 5 to 10 minutes