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In this optics/mathematics activity, learners use two hinged mirrors to create a kaleidoscope that shows multiple images of an object.

In this activity about afterimages, learners explore what happens when receptor cells called cones in your eye's retina get tired.

This fun and simple hands-on astronomy activity lets learners explore the difference between telescope magnification and resolution.

In this activity about depth perception, learners create an optical illusion in a shoe box.

In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object.