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

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this physics activity, learners will explore buoyancy.

In this experiment, learners float colored ice cubes in hot and cold water.

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.

Learners observe a flask with a balloon attached over the mouth and inverted inside the flask.

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).

Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.

In this quick activity, learners drink Avogadro's number worth of molecules - 6.02x10^23 molecules!

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.

Water, whether fresh or salty, serves as one of the best electrical conductors on the planet. Does salt effect its conductivity?

In this activity, learners build a simple electrolysis device. Then learners use an indicating solution to visualize hydrogen and oxygen molecules in water.

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.

This activity offers learners and their families several ways to raise their awareness together about home water.

In this activity, learners use found natural materials to create a water haven for bees and other insects.