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These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.

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

In this activity (18th on the page), learners conduct an experiment to examine memory.

This activity (8th activity on the page) tests learners' ability to identify things using only the sense of hearing.

In this activity (3rd on the page), learners investigate circadian rhythms by examining how well people do with estimating time.

In this activity (23rd on the page), learners conduct an experiment to examine memory and learning.

In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.

This activity is designed to let learners measure their reaction time or response time to something they see.

In this activity (5th activity on the page), learners explore how what you see influences taste. In experiment 1, learners taste five sodas, one of which is clear soda with orange food coloring.

In this activity, learners make a Benham Top to explore visual illusions and optics.

In this activity, learners investigate visual perception as well as plan and conduct their own experiments.