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In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red.

In this activity (on pages 4-5), learners make fake snow by adding water to the super-absorbant chemical from diapers, sodium polyacrylate.

In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object.

In this activity, learners are challenged to lift a floating ice cube out of a glass of water using just one end of a piece of string.

In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.

This activity gets learners looking at 6-sided shapes in nature, including the cells of a beehive, as well as other shapes.