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In this group activity, learners see and hear the speed of sound. A learner designated the "gonger" hits a gong, once every second, as the rest of the group watches and listens from a distance.

$1 - $5 per group Ages 11 - 18 10 to 30 minutes
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Can gelatin (like Jell-O ®) change the speed of light?

$5 - $10 per group Ages 14 - 18 1 to 2 hours
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In this activity, learners use a laser pointer, empty soda bottle, rubber plug and water to demonstrate total internal reflection.

free Ages 14 - 18 5 to 10 minutes