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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.

Like water drops in falling rain, a CD separates white light into all the colors that make it up.

In this four-part activity, learners explore light and sound through a variety of hands-on investigations.

In this activity, learners explore how and why rainbows form by creating rainbows in a variety of ways using simple materials. Learners create rainbows indoors and outdoors.

In this activity, learners create a "mini sky" in a glass of water in a dark room.

This activity generates learner excitement about light through the creation of a room-sized rainbow.

In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.

In this activity, learners create a water prism to break light into the seven colors of the rainbow.

In this optics activity, learners split white light into all its component colors using three household items: a compact disc, dishwashing liquid, and a hose (outside).

In this activity, learners explore why they can see colors in bubbles and why they change.

In this optics activity, learners use everyday materials to make a color wheel. When learners spin the wheel like a top, they will be surprised to see all the colors mixing together to appear white.

In this optics activity, learners explore color by examining color dots through colored water and the light of a flashlight.

In this activity, learners will explore how light can refract or break apart into different colors.

In this activity, learners explore the concept of density by pouring 5 different liquids into a jar. Food coloring is added if needed to give each liquid a distinct color.