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In this activity, learners use an old CD to construct a spectroscope, a device that separates light into its component colors.

In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

In this activity about light and perception, learners create pictures in thin air.

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

Whether it's the genetic code, an ancient language, or patterns of light in a distant galaxy, scientists often have to play the role of decoder.

In this activity, learners light an LED with five cents. Learners use two different metals and some sour, salty water to create a cheap battery.