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In this activity about depth perception, learners create an optical illusion in a shoe box.

In this activity, learners discover that it's difficult to distinguish between two different shades of gray when they aren't separated by a boundary.

Learners use two mirrors to explore how images of images of images can repeat forever.

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 demonstration, learners investigate mass, gravity, and acceleration by dropping a wooden bar with a balloon attached to its underside, a mass suspended from it by rubber bands, and a sharp-poi