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

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 optics activity, learners use water to make a coin "appear" and "disappear." Use this activity to demonstrate how light refracts and introduce light as waves.

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

Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.