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In this online activity, learners make a whole rainbow by mixing red, green, and blue light. They can change the wavelength of a monochromatic beam or they can filter white light.

free Ages 6 - adult 5 to 10 minutes
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In this activity, learners make an optical illusion toy from the 1800s to explore persistence of vision.

$1 - $5 per student Ages 6 - 11 5 to 10 minutes