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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.

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

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 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 will make a thaumatrope, an old-fashioned optical illusion that dates back to the 1820s.

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