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In this activity, learners explore their eye pupils and how they change.

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 optics activity, learners create flip books by drawing an image like an eye opening and closing on 24 small pages of paper.

In this demonstration, amaze learners by performing simple tricks using mirrors. These tricks take advantage of how a mirror can reflect your right side so it appears to be your left side.

In this optics activity, learners build an animation tool to make mini movies. When you spin a phenakistascope, the pictures move so quickly that your eyes and brain can't separate the images.

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

In this activity (posted on March 20, 2011), learners follow the steps to construct a stroboscope, a device that exploits the persistence of vision to make moving objects appear slow or stationary.

In this fun sticker activity, learners will create a size wheel with images of objects of different size, from macroscopic scale (like an ant) to nanoscale (like DNA).