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

This fun activity uses simple materials such as milk cartons and mirrors to introduce the ideas of optics and visual perception.

Learners experiment with a commercially available liquid-crystal coaster. They warm the material with their hands for varying lengths of time and observe the changing colors that result.

In this activity, learners construct a device that allows them to look over ledges or around corners.

This is written as a display, but can easily be adapted to a hands-on activity. Learners observe and shake containers of shiny liquids.