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In this activity, learners investigate the history and development of agricultural biotechnology.

This game depicts a woman going through her day, faced with various loud sounds.

This game plays a dozen different sounds, altered to simulate what they would sound like if you had hearing loss.

In this optics activity, learners build a spy tool to secretly view things over walls or around corners.

During this activity, learners take part in a variety of tasks which involve moving and balancing different body parts.

In this exercise (Activity #2 on page), learners test their distance vision to evaluate their overall eyesight.

In this online activity, learners role-play as medics, treating a patient with missing organs. Learners select different organs, then drag them into the proper location in the patient's body.

In "Chemistry Makes Scents," participants use their noses to distinguish between chemicals with very similar structures.

In this optics activity, learners explore why the sky is blue and the sunset is red, using a simple setup comprising a transparent plastic box, water, and powdered milk.

Can you deceive your eyes? When your eyes work normally, you see a nice 3 dimensional picture, but what happens when each eye sees something different?

How far can you see out of the corner of your eye? Grab a partner and find out from the Exploratorium Science Snack.

Use this hands-on activity to demonstrate infrared and thermal radiation.

Learners add drops of alginate solution to a solution of calcium chloride. The alginate does not mix with the calcium chloride, but forms soft gel beads.

In this optics activity, learners discover that when they rotate a special black and white pattern called a Benham's Disk, it produces the illusion of colored rings.

This activity introduces learners to wolf behavior and communication.

In this activity, learners practice drawing 3D structures in two dimensions. Learners draw cube stacks from five different points of view.

In this artistic activity, learners blow up a smaller picture into a larger one, by using a grid.

In this optics activity, learners use everyday materials to make a color wheel. When learners spin the wheel like a top, they will be surprised to see all the colors mixing together to appear white.

This perception trick focuses on conflicting information to the brain...instead of trying to see two images, you're trying to get a bright spot by overlapping the image you see through two tubes.

This simple hands-on activity demonstrates why the sky appears blue on a sunny day and red during sunrise and sunset.