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In this activity, learners investigate color vision as well as plan and conduct their own experiments.

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

Make a big canvas of iridescent color with pvc pipe! In this Exploratorium Science Snack, you'll need to cut and assemble some PVC pipe, but the pay-off, the soap-bubble canvas, is big.

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.

In this activity, learners investigate the olfactory system by conducting several experiments.

In this activity, learners investigate the sense of hearing and plan and conduct their own experiments.

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

In this activity, learners investigate the touch sensory system and discover how to plan and carry out their own experiments.

In this activity (4th activity on the page), learners test to see if saliva is necessary for food to have taste.

In this activity about vision and optical illusions, learners conduct a simple test to demonstrate how our eyes create "afterimages." Learners stare at a black cardboard bat for at least 30 seconds an

In this four-part activity, learners explore how the body works and the chemistry that happens inside living things.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.

In this activity, learners work together to create a life-sized drawing of the human nervous system.

In this activity on page 9 of the PDF, learners test how flavoring extracts move through the walls of a balloon.

This activity is designed to accompany the PBS documentary about African-American chemist "Percy Julian: Forgotten Genius." Learners look through two cups with small holes in them to simulate what it'

Learners make kimchee or sauerkraut, which is really just fermented cabbage, in a 2-liter plastic bottle.