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In this activity, learners actually feel the difference in energy required to light two different types of light bulbs: incandescent light and LEDs.

This simple hands-on activity demonstrates why the sky appears blue on a sunny day and red during sunrise and sunset.

This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match.

In this optics activity, learners explore how they can make gelatin stop light, but not stop them from seeing fruit suspended within.

In this optics activity, learners explore how light bends and affects what we see.

In this activity, learners use gelatin as a lens to investigate the properties of laser light.

In this optics activity, learners make a "light fountain" from a clear plastic bottle, flashlight, and other simple materials.

In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it.

In this activity, learners observe what happens when they give a light source like a neon glow lamp a "Bronx Cheer." The lights appear to wiggle back and forth and flicker when learners blow air throu

In this activity, learners explore why the sky is blue. Learners model the scattering of light by the atmosphere, which creates the blue sky and red sunset, using a flashlight and clear glue sticks.

In this sunny day activity, learners compare how a cup of water and a cup of tonic water reflect or refract light in the sun.

In this optics activity, learners discover that not all shadows are black. Learners explore human color perception by using colored lights to make additive color mixtures.

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

In this optics activity, learners work in pairs to explore how mirrors work. Learners use tape to mark the angles needed to see each other's reflection in a wall mirror.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.

In this activity about light and reflection, learners discover that what you see is often affected by what you expect to see.

Learners explore their surroundings while reasoning about categories and counting.

In this simple activity, learners investigate refraction by placing a picture of an arrow behind a glass of water.

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 (12th on the page), learners investigate their ability to discriminate (see) different colors.