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This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?

In this activity about light and perception, learners discover how a flash of light can create a lingering image called an "afterimage" on the retina of the eye.

Known as the waterfall effect, this activity demonstrates adaptation in our visual system.

In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.

In this activity, learners work in groups to create a time line representing significant moments in their lives.

Put a string around your head, and play it! Learn about vibration, sounds, and pitch.

In this activity, learners sublimate dry ice and then taste the carbon dioxide gas.

We listen to stereo music systems, tv's, and radios because it simulates being where the sound originates.

In this demonstration, amaze learners by performing simple tricks using mirrors. These tricks take advantage of how a mirror can reflect your right side so it appears to be your left side.

Create an instrument that you don't play--you just listen to it through tubes of various lengths.

Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.

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 about depth perception, learners create an optical illusion in a shoe box.

In this optics activity, learners discover how they can make glass objects "disappear." Learners submerge glass objects like stirring rods into a beaker of Wesson™ oil to explore how the principles of

In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair.

In this activity, learners explore the "nuts and bolts" of gene chips.

In this optics activity, learners examine how polarized light can reveal stress patterns in clear plastic.

In this long-term activity, learners make a home for a colorful community of microorganisms.

In this activity related to Archimedes' Principle, learners use water displacement to compare the volume of an expanded gummy bear with a gummy bear in its original condition.

Can you deceive your eyes? When your eyes work normally, you see a nice 3 dimensional picture, but what happens when each eye sees something different?