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In this activity, learners explore how light and dark colored objects absorb the Sun's radiations at different rates.

In this activity, learners make a Benham Top to explore visual illusions and optics.

In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.

Learners add different liquids (water, salt water, alcohol, and detergent solution) to water and observe the different ways the different liquids combine with water.

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

In this optics activity, learners use a shoebox, colored cellophane and sunlight to "change" the colors of gumballs. Learners will be surprised when the green and blue gumballs appear black!

In this activity, learners trap a thin layer of air between two pieces of Plexiglas to produce rainbow-colored interference patterns.

In this optics activity, learners explore why the sky is blue and the sunset is red, using a simple setup comprising a transparent plastic box, water, and powdered milk.

Learners use chromatography to separate and analyze the mixture of pigments in leaves. Use this activity to discuss photosynthesis as well as why leaves change color in autumn.

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