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In this activity, learners use their imaginations and picture a scene in their heads.

In this optics activity, learners explore color by examining color dots through colored water and the light of a flashlight.

In this activity, learners explore how nanosized structures can create brilliant color.

In this optics/mathematics activity, learners use two hinged mirrors to create a kaleidoscope that shows multiple images of an object.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

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

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

In this activity on page 13 of the PDF, use a special plastic card that has been painted with a chemical that changes color when it is in UV light.

This is an activity about turbidity, or the amount of sediment suspended in water.