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    University of Washington
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    In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors. Learners arrange jars, each filled with water and different amounts of food coloring,...

    1 cent - $1 per group Ages 8 - 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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    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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    Science Friday
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    In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways. By building their own pinhole viewers, learners make observations about the...

    1 cent - $1 per student Ages 11 - 14 45 to 60 minutes
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    The Exploratorium
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    If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge? Of course not, but if you moved that slit back and forth rapidly, you might see how your brain...

    1 cent - $1 per student Ages 6 - 14 Under 5 minutes
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    Community Science Workshop Network
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    In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see. Learners use simple materials to build a Circle Spinner, Thaumatrope, and...

    $1 - $5 per student Ages 6 - 18 30 to 45 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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    The Exploratorium
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    In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself. This...

    $1 - $5 per student Ages 8 - 14 Under 5 minutes
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    University of Washington
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    In this activity, learners investigate visual perception as well as plan and conduct their own experiments. In "CLASS EXPERIMENT," learners discover how depth perception works by testing...

    1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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    WGBH
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    In this artistic activity, learners blow up a smaller picture into a larger one, by using a grid. The activity prompts students to think about how their eyes and brain work together to make sense...

    1 cent - $1 per group Ages 6 - 11 30 to 45 minutes

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