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In this activity, learners overlap the three primary colors to see how all other colors are made.

In this activity (16th on the page), learners play a variation of the "I Spy" game to explore color. Learners work in teams with each team assigned a color.

In this activity, learners will explore how their own eyes work by experimenting with their photoreceptors.

In this optics activity, learners build a spy tool to secretly view things over walls or around corners.