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CD Spinner
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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.
Water Sphere Lens
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In this activity about light and refraction, learners make a lens and magnifying glass by filling a bowl with water.
Kaleidoscope
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In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).
Upside-Down Town
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In this activity, learners explore ray optics. Learners discover that they can use a magnifying glass to create an upside-down image.
Moiré Patterns
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In this activity about light and perception, learners create and observe moire patterns.