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    Institute of Physics
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    In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass. This is a simple trick that involves several complex physical...

    1 cent - $1 per group Ages 8 - adult Under 5 minutes
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    Institute of Physics
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    In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass. They will be especially shocked when you hold the glass over their head and...

    free Ages 4 - adult Under 5 minutes
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    University of Washington
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    In this activity (13th on the page), learners complete a simple illusion trick to see through their own hand. Learners roll up a piece of notebook paper into a tube, arrange their hands in a...

    1 cent - $1 per group Ages 8 - 18 Under 5 minutes
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    The Exploratorium
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    In this optics activity, learners discover how they can make glass objects "disappear." Learners submerge glass objects like stirring rods into a beaker of Wesson™ oil to explore how the...

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity, a lightbulb is placed in front of a concave mirror. The actual lightbulb is not visible to the viewer, but the viewer can see the mirror image of the lightbulb formed in space....

    Over $20 per group Ages 8 - 14 30 to 45 minutes
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    Institute of Physics
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    In this demonstration, learners will be "wowed" as three matches burn to form a triangular pyramid shape and "magically" rise off the table. Learners will observe as the matches...

    1 cent - $1 per group Ages 4 - adult Under 5 minutes
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    The Exploratorium
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    In this activity about light and reflection, learners use a special device called a Mirage Maker™ to create an illusion. What they perceive as an object is really an image in space, created by two...

    Over $20 per student Ages 8 - 14 5 to 10 minutes
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    Colorado State University
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    This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly. They will...

    1 cent - $1 per group Ages 8 - 18 Under 5 minutes