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In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.

In this activity about light and perception, learners create pictures in thin air.

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

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.