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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.

Build your own version of a favorite carnival game, in which a marble races down a maze consisting of rows of nails.

In this activity, learners create 3D geometric shapes using straws and pipe cleaners.

In this activity, learners discover that some things only stand up while they are spinning.

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