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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.

In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

In this activity, learners will create an optical illusion top. Learners will explore color mixing, physics and design through this activity.

In this lab (Activity #1 on page), learners explore how we see color.