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    The Exploratorium
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    In this activity about light and perception, learners create and observe moire patterns. These special patterns, which appear when two repetitive patterns overlap, can also be used to help learners...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns. Learners will use Benham's...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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    The Exploratorium
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    In this demonstration, amaze learners by performing simple tricks using mirrors. These tricks take advantage of how a mirror can reflect your right side so it appears to be your left side. To make...

    Over $20 per group Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    How can you make one shade of gray look like two? By putting it against two different color backgrounds! This activity allows learners to perform this sleight of hand very easily. They will be...

    $1 - $5 per student Ages 8 - 18 30 to 45 minutes
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    The Exploratorium
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    In this fun optics activity, learners explore principles of light, reflection (mirrors), and perception. Learners work in pairs and sit on opposite sides of a "two-way" mirror. Both...

    Over $20 per group Ages 6 - 18 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 explore their eye pupils and how they change. Learners use a magnifying glass, mirror, and flashlight to observe how their pupil changes size in response to changes in...

    free Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict? In this Exploratorium produced activity, do you see an oval or circle...

    1 cent - $1 per student Ages 4 - adult Under 5 minutes
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    The Exploratorium
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    Do you have a hard time matching paint swatches with your furniture? When you consider human perception, color is context dependent. In this Exploratorium produced activity, you will see how you...

    1 cent - $1 per student Ages 4 - adult 5 to 10 minutes
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    The Exploratorium
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    Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

    1 cent - $1 per student Ages 4 - 14 Under 5 minutes

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