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

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 optics activity, learners make a lens and explore how the eye manipulates the light that enters it.

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.

In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.

In this activity related to flight, learners conduct two simple tests to explore how lift works.