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

1 cent - $1 per group Ages 8 - 18 5 to 10 minutes
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In this activity (17th on the page), learners investigate why you cannot see colors in dim light.

$1 - $5 per group Ages 4 - 18 5 to 10 minutes