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    University of Washington
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    In this activity (3rd on the page), learners conduct a series of tests to find out which of their eyes is more dominant. In other words, do they prefer to use their right or left eye to complete...

    1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object. Learners will also discover that because...

    1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners discover that it's difficult to distinguish between two different shades of gray when they aren't separated by a boundary. Learners will be surprised when two...

    $1 - $5 per group Ages 8 - 14 5 to 10 minutes
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    The Exploratorium
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    In this activity, learners make a stroboscope--a spinning disk with slits around the edge that you look through. Brief but frequent glimpses of images seen through the slits lead to a surprising...

    1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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    Science Museum of Minnesota
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    This online activity lets learners discover to what extent they notice changes to an online image. The activity has two parts. In part one, learners look at a scene and try to notice what happens...

    free Ages 6 - adult 5 to 10 minutes
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    NISE Network
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    In this story time program, young learners listen to the Dr. Seuss book "Horton Hears a Who." Learners use their eyes to look at small things using lenses and use their sense of smell to...

    Over $20 per group Ages 4 - 11 10 to 30 minutes
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    National Health Museum
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    In this exercise (Activity #2 on page), learners test their distance vision to evaluate their overall eyesight. Learners attempt to read the letters on a Snellen Eye Chart from 20 feet away, while...

    free Ages 8 - 18 5 to 10 minutes
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    National Health Museum
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    In this lab (Activity #1 on page), learners explore how we see color. Learners set up an experiment to evaluate how a group of learners view different colors as presented on different background...

    $1 - $5 per group Ages 8 - 18 45 to 60 minutes
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    The Exploratorium
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    This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match. Although this is a perception activity, it also...

    free Ages 6 - 18 5 to 10 minutes
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    New York Hall of Science
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    Create 3D glasses and use them to explore color, light and optics. Fool your brain into 'seeing' three dimensions on a flat surface!

    1 cent - $1 per student Ages 6 - 18 10 to 30 minutes

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