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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.

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.

Learners experiment to see which colors of light will cause a phosphorescent (glow-in-the-dark) material to glow.

In this four-part activity, learners will discover the exciting world of light--the most important form of energy in our world--and be able to identify and describe different types of light.

Can gelatin (like Jell-O ®) change the speed of light?

In this optics activity, learners explore interference by adding wax blocks to a ripple tank.

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