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In this activity, learners discover how to determine the distance to a lightning strike or nearby thunderstorm.

Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere.

The "Rocket Reactions" activity is an exciting way to learn about how materials interact, behave, and change.

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

Testing magnets is always a fun pastime, but here, we're going beyond "will it attract the magnet?" In this activity, learners will investigate which materials allow magnetic fields to pass through or

This activity (page 2) draws upon a familiar, computer-based concept related to visual resolution: pixilation.

Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

In this activity, learners use heat to separate zinc and copper in a penny. This experiment demonstrates physical properties and how physical change (phase change) can be used to separate matter.

In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

This activity (9th activity on the page) about hearing demonstrates to learners the importance of having two ears.

Do grapes, yes the grapes from the grocery store, move in the presence of a very strong magnet?

In this activity, learners work in pairs to measure each other's ankles with lengths of string.

Things that are different sizes and stiffness vibrate differently, and in this Exploratorium Science Snack, you'll see how rings of various diameters react to vibration and external forces.

In this chemistry demonstration, learners will discover that phenolphthalein is an acid/base indicator. One learner will read a poem about four witches making a potion.

In this activity on page 4 of the PDF, explore the unique molecular structure and conductive nature of graphene. Learners construct a circuit with a battery and LED bulb.

In this activity (on page 2 of the PDF), learners explore surface tension by adding pennies to cups which are "full" of plain water or soapy water.

In this activity, learners can play two card games related to endangered species, specifically North American amphibians.

How far can you see out of the corner of your eye? Grab a partner and find out from the Exploratorium Science Snack.

In this activity (2nd activity on the page), learners explore the sensitivity of their sense of touch.