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Learners demonstrate how water can distort, refract and magnify light.

In this activity, learners use tonic water to detect ultraviolet (UV) light from the Sun and explore the concept of fluorescence.

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

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

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

This is a quick activity (on page 2 of the PDF under Butterfly Wings Activity) that illustrates how nanoscale structures, so small they're practically invisible, can produce visible/colorful effects.

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 experience firsthand how marine animals' adaptive coloration camouflages them from prey.

This is a quick activity (on page 2 of the PDF under Stained Glass Activity) about the "Tyndall effect," the scattering of visible light when it hits very small dispersed particles.