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Learners observe different light sources, outdoors and indoors, using prism glasses (diffraction glasses) and color filters.

In this activity, learners explore liquid crystals, light and temperature. Using a postcard made of temperature-sensitive liquid crystal material, learners monitor temperature changes.

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

In this activity, learners sublimate dry ice and then taste the carbon dioxide gas.

In this activity, learners will explore how the human brain interprets environmental stimuli.

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

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

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

In this neuroscience activity (5th activity on the page), learners explore their sense of touch without using their senses of vision and hearing.

Are fingers the only place on the body where we use our sense of touch? In this activity (6th activity on the page), learners test the touch sensitivity of different parts of the body.

In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.

In this activity (4th on the page), learners conduct a series of tests to find out which of their ears is more dominant.

This is a quick and simple demonstration about reflexes (fourth activity on the page). One learner stands behind a see-through barrier like a window or wire screen.

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

In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.

This activity was designed for blind learners, but all types of learners can use it to learn to differentiate between qualitative and quantitative observations and to practice data collection.

In this activity, learners explore color, light and shadow by creating their own puppets to hold in front of a light source.

In this activity (4th activity on the page), learners use their sense of smell to rate and arrange containers filled with different dilutions of a scent (like cologne or fruit juice) in order from wea

In this activity, learners surprise their eyes with an optical illusion involving arrows made out of pipe cleaners.