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

In this activity, learners construct a device that allows them to look over ledges or around corners.

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, learners make an optical illusion toy from the 1800s to explore persistence of vision.

In this optics activity, learners build a spy tool to secretly view things over walls or around corners.