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In this activity, learners discover that it is difficult to trace a curve by using its reflection in a mirror. Use this activity to discuss how the brain works.

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

In this online game, learners practice memory recall. They are shown a collage of pictures for two minutes, then have to write down everything they remember and check how they did.

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 calculate the width (horizontal diameter) of the blind spot on their retina. Learners make a blind spot tester using a piece of notebook paper.

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

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

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