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In this activity, learners make a scale model of the Solar System and learn the real definition of "space." Learners use the online calculator to create an appropriate scale to use as a basis for thei

Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!

An ordinary camera has a lens that makes an image on film. In a pinhole camera, a small hole replaces the lens.

This activity shows you how to make amazing crystal spikes using Epsom salt and the sun.

In this activity, learners explore how polarizing sunglasses can help diminish road glare.