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In this activity, learners make their own heat waves in an aquarium.

With a coffee filter, a black marker, and a cup of water, discover the secret colors hidden in black ink.

In this activity about light and refraction, learners make a lens and magnifying glass by filling a bowl with water.

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

In this activity, learners use simple materials to create giant bubbles.

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

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.