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    WGBH
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    In this activity, learners conduct an experiment to test how fast they can react. Learners try to catch a piece of paper with a ruler printed on it (or a ruler) as quickly as they can. Learners...

    free Ages 6 - 11 5 to 10 minutes
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF) is a full inquiry investigation into dogs' ability (or inability) to see color. Learners conduct an experiment by first performing a control test and then...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours
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    University of Washington
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    These two activities (4th on the page) demonstrate the importance of two eyes in judging depth. In the first activity, two learners compare the accuracy of dropping objects into a cup using only...

    1 cent - $1 per student Ages 8 - 18 5 to 10 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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    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