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Learners explore three-dimensional geometric frames including cubes and tetrahedrons, as they create bubble wands with pipe cleaners and drinking straws.

In this hands-on botany activity, learners sprout vegetables in film canisters.

If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge?

An ordinary camera has a lens that makes an image on film. In a pinhole camera, a small hole replaces the lens.