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In this activity, learners explore ray optics. Learners discover that they can use a magnifying glass to create an upside-down image.

$1 - $5 per group Ages 4 - 11 10 to 30 minutes
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In this activity about afterimages, learners explore what happens when receptor cells called cones in your eye's retina get tired.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes