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

In this optics activity, learners conduct an experiment to find out why two eyes are better than one!

This is a series of three quick science activities to do with a spoon, knife, and fork. In the first two activities, learners use the flatware to explore optics, mirrors, reflection, and distortion.

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.

In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.

In this quick activity/demonstration (5th on the page), learners explore depth perception.