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

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

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

In this activity, learners explore how mirrors reflect light and change the way we see things.

In this activity, learners experience firsthand how marine animals' adaptive coloration camouflages them from prey.