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This activity demonstrates the importance of wearing a helmet to protect the brain. An egg is used to symbolize a head with the shell as the skull and the inside of the egg as the brain.

In this activity, learners estimate risks associated with different events and compare their estimates to the real possibilities.

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

In this activity about neuron/target muscle recognition (page 44 of the PDF), learners arranged in two rows facing away from each other use string to simulate neural development.

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

In this activity (3rd on the page), learners conduct a series of tests to find out which of their eyes is more dominant.

In this activity (on page 134 of the PDF), learners explore reaction time.

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

In this activity (page 105 of the PDF), learners measure heart rate and blood pressure and learn how to obtain consistent measurements during repeated tests.