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In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.

In this activity, learners will make their own prism and use a glass of water to separate sunlight into different colors.

In this optics activity, learners examine how polarized light can reveal stress patterns in clear plastic.

In this activity, learners sublimate dry ice and then taste the carbon dioxide gas.

Like water drops in falling rain, a CD separates white light into all the colors that make it up.

Learners use two mirrors to explore how images of images of images can repeat forever.

In "Exploring the Universe: Exoplanet Transits," participants simulate one of the methods scientists use to discover planets orbiting distant stars.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.

In this activity about light and reflection, learners discover that what you see is often affected by what you expect to see.

Learners explore their surroundings while reasoning about categories and counting.

In this activity, learners investigate the properties of graphene and graphite.

Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.

In this simple activity, learners investigate refraction by placing a picture of an arrow behind a glass of water.

Do you have a hard time matching paint swatches with your furniture? When you consider human perception, color is context dependent.

In this activity, learners control the (apparent) size of a hole with their brain.

Make a big canvas of iridescent color with pvc pipe! In this Exploratorium Science Snack, you'll need to cut and assemble some PVC pipe, but the pay-off, the soap-bubble canvas, is big.

Learners measure a bottle full of air, and then use a vacuum pump to remove the air. When they re-weigh the bottle, learners find the mass is about 0.8g less.

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 create a colorful bookmark using a super thin layer of nail polish on water. Learners discover that a thin film creates iridescent, rainbow colors.

In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.