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    University of Washington
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    In this activity (17th on the page), learners investigate why you cannot see colors in dim light. With five pieces of paper of different colors in front of them, learners sit in the dark for about...

    $1 - $5 per group Ages 4 - 18 5 to 10 minutes
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    University of Washington
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    In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions. Learners sort similar bottle caps in a well-lit...

    free Ages 8 - 18 10 to 30 minutes
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    The Exploratorium
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    Make a camouflage cut-out animal! Using patterned paper or magazine pictures from around the house, use your craft skills to make a paper animal that blends into its background.

    1 cent - $1 per student Ages 4 - 11 5 to 10 minutes
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    University of Washington
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    In this activity, learners investigate color vision as well as plan and conduct their own experiments. In "CLASS EXPERIMENT," learners discover that afterimages occur because of...

    $5 - $10 per group Ages 8 - 18 1 to 2 hours
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    The Exploratorium
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    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.

    1 cent - $1 per student Ages 6 - 14 Under 5 minutes
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    WGBH
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    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.

    1 cent - $1 per group Ages 6 - 11 10 to 30 minutes
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    University of Washington
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    In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation....

    free Ages 8 - 18 Under 5 minutes
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    University of Washington
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    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. They use simple geometry...

    1 cent - $1 per student Ages 11 - 18 5 to 10 minutes
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    The Exploratorium
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    Experience a spinning spiral...you won't be hypnotized, but you'll see what happens when you look away. It's like getting off a merry-go-round and everything keeps moving.

    1 cent - $1 per student Ages 6 - adult Under 5 minutes
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    University of Washington
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    In this activity, learners investigate the sense of sight and develop and conduct their own experiments. In "CLASS EXPERIMENT," learners measure their central and peripheral visual fields...

    $10 - $20 per group Ages 8 - 18 1 to 2 hours

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