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In this activity, learners explore how water behaves differently when it comes in contact with "nano sand" and regular sand.

In this activity, learners will explore basic information about thermodynamics by experimenting with ice. Learners will compare ice melting rates on metal pans or plastic cutting boards.

In this activity, learners explore the forces at work in water. Learners experiment to find out what happens to pepper in water when they touch it with bar soap and liquid detergent.

In this activity, learners will discover why there are holes in bread.

In this activity, learners make their own heat waves in an aquarium.

In this activity, learners will explore the physics of liquids and gas by playing with both! Learners of any age use their own breath to move drops of water across a smooth wax paper surface.

In this activity, learners explore and compare the buoyant properties of materials found in nature and in human-made materials.

The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

Learners add two dyes to mineral oil and water, and then compare their miscibility (how well they mix) in each.

In this physics activity, learners will explore buoyancy.

In this activity, learners will write a secret message that only their friends will be able to read.

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

In this activity, learners explore how engineering has developed various means to remove impurities from water.

In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).

Electrolysis is the breakdown of water into hydrogen and oxygen. This Exploratorium activity allows learners to visualize the process with an acid-based indicator.

In this activity, learners play with surprising sand that doesn’t get wet! Learners explore how water behaves differently when it comes in contact with "magic sand" and regular sand.

This is an activity/demo in which learners are exposed to the difference bewteen hydrophobic surfaces (water repelling) and hydrophilic surfaces (water loving).

In this activity, learners explore how the application of nano-sized "whiskers" can protect clothing from stains.

In this activity, learners of all ages can become food scientists by experimenting with flour and water to make basic pasta.

In this outdoor activity, learners compare the moisture released from different kinds of leaves and from different parts of the same leaf, by observing the color change of cobalt chloride paper.