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In this activity related to the famous "Stroop Effect," learners explore how words influence what we see and how the brain handles "mixed messages." Learners read colored words and are asked to say th

In this activity, learners discover that the human brain is highly adaptable. Learners try to toss beanbags at a target while wearing prism goggles.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

In this activity, learners investigate the sense of sight and develop and conduct their own experiments.

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

In this activity, learners investigate color vision as well as plan and conduct their own experiments.

In this activity, learners control the (apparent) size of a hole with their brain.

Create 3D glasses and use them to explore color, light and optics. Fool your brain into 'seeing' three dimensions on a flat surface!

In this activity (last activity on the page), learners make a model of the eardrum (also called the "tympanic membrane") and see how sound travels through the air.

In this activity, learners investigate procedural memory.

This activity (9th activity on the page) about hearing demonstrates to learners the importance of having two ears.

In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation.

In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.

In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.

In this activity (1st on the page), learners find their blind spot--the area on the retina without receptors that respond to light.

In this fun optics activity, learners explore principles of light, reflection (mirrors), and perception. Learners work in pairs and sit on opposite sides of a "two-way" mirror.

In this activity (11th activity on the page), learners use pennies to test their hearing acuity.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.