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In this activity (16th on the page), learners play a variation of the "I Spy" game to explore color. Learners work in teams with each team assigned a color.

In this optics activity, learners build an animation tool to make mini movies. When you spin a phenakistascope, the pictures move so quickly that your eyes and brain can't separate the images.

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

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

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

This activity (on page 2 of the PDF under SciGirls Activity: Colorblind Dogs) is a full inquiry investigation into dogs' ability (or inability) to see color.

In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair.

In this lab (Activity #1 on page), learners explore how we see color.

In this activity, learners investigate the sense of sight and develop and conduct their own experiments.

In this optics activity, learners conduct an experiment to explore peripheral vision. Learners collect data about their ability to see shapes, colors, or letters using their peripheral vision.

If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge?

Which one of your eyes are dominant? Do they act independently or are they equally "in control?" This activity explores how your eyes work (or don't work) together.

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.

In this activity, learners construct a device that allows them to view 2-D images in 3-D.

In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

In this activity (1st on the page), learners find their blind spot--the area on the retina without receptors that respond to light.

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

In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.

In this activity about light and perception, learners create pictures in thin air.

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