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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 activity, learners create an optical illusion by spinning two attached cups. A round ball seems to magically appear when the cups spin.

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

In this activity, learners surprise their eyes with an optical illusion involving arrows made out of pipe cleaners.

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