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Kaleidoscope
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In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).
Geometry Construction: Polyhedral Playthings
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In this activity, learners create 3D geometric shapes using straws and pipe cleaners.
Bouncing Yo-Yo
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In this activity, learners build unique yo-yos, which spin round and round without moving up and down.
Tops
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In this activity, learners discover that some things only stand up while they are spinning.