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In this activity, learners construct a device that allows them to view 2-D images in 3-D.

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.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

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

This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope.

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.