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In this activity, learners investigate the sense of sight and develop and conduct their own experiments.

In this activity, learners explore the many uses of periscopes and how this simple device was designed and is used in many applications.

Discover how a refracting telescope works by making one from scratch using common items. This telescope won't have a tube so the learner can see how an image is formed inside the telescope.

In this activity, learners construct a projector out of cardboard to view their favorite images (such as storybook illustrations) on the wall.

In this activity, learners construct a device that projects images onto a surface, so they can trace landscapes and other sights.