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In this activity, learners will explore light with reflective surfaces. Learners will make predictions and share their observations as they experiment with directing a beam of light.

Learners observe different paper samples under ordinary room light and under a black light to learn some of the chemical differences between different types of paper.

In this fun optics activity, learners explore principles of light, reflection (mirrors), and perception. Learners work in pairs and sit on opposite sides of a "two-way" mirror.

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

In this activity, learners will build a model of a nebula using cotton balls and colored water. Astronomers photograph nebulas and add colors to provide information about the nebula's composition.

In this activity, learners will create their own simple shadow puppets, and experiment with light and shadow while playing with them.

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

In this activity, learners investigate how some butterfly wings get their color.

In this activity, learners will see how UV light affects colors over time by making their own sunprint on construction paper.

In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays.

Create 3D glasses and use them to explore color, light and optics. Fool your brain into 'seeing' three dimensions on a flat surface!

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

Use this Moon Map Guide to help learners identify features on the Moon, while looking through a telescope.

Why should we wear masks? Do masks work? Do some masks work better than others? Learners find out in this activity.

This fun and simple hands-on astronomy activity lets learners make 3-dimensional models of the Earth and Moon.

Many people get water from a source deep underground, called groundwater.