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

In this activity, learners create a cylindrical mirror to see themselves as others see them.

This is a great activity about wave interference. Learners will create their own wave machine and discover wave properties through hands-on investigation.

In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

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 activity, learners investigate the reflective properties of light and mirrors as they make a kaleidoscope.

In this activity, learners explore liquid crystals, light and temperature. Using a postcard made of temperature-sensitive liquid crystal material, learners monitor temperature changes.

In this activity, learners explore how pictures change in curved mirrors. Learners make cylindrical mirrors by wrapping Mylar around soda cans.

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

In this two-part activity, learners explore the properties of liquid crystals, which are responsible for why mood rings change color.

In this math lesson, learners explore transformations and quadratic functions through toothpick patterns.

In this activity, learners explore how polarizing sunglasses can help diminish road glare.

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 make optical fibers out of strips of gelatin.

In this activity (page 1 of the PDF under SciGirls Activity: Horse Ears), learners observe how an animal responds to its own reflection.

In this activity, learners use the Sun's energy to cook marshmallows. Learners construct the solar oven out of simple everyday materials.