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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

In this activity, learners create a cylindrical mirror to see themselves as others see them.

In this activity about light and refraction, learners make a lens and magnifying glass by filling a bowl with water.

In this activity, learners construct a three-dimensional ambiguous cube to explore visual illusions and how our brains interpret or misinterpret information.

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 about light and perception, learners create and observe moire patterns.