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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 (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.

$5 - $10 per group Ages 8 - 18 1 to 2 hours