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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

$5 - $10 per student Ages 8 - 14 45 to 60 minutes
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In this activity, learners explore how engineers work to solve the challenges of a society, such as delivering safe drinking water.

$10 - $20 per group Ages 8 - 18 1 to 2 hours
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In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.

$1 - $5 per group Ages 6 - 14 30 to 45 minutes
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In this activity, learners explore how engineering has developed various means to remove impurities from water.

$10 - $20 per group Ages 8 - 18 1 to 2 hours
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In this activity, learners visualize the differences in water density and relate this to the potential consequences of increased glacial melting.

$5 - $10 per group Ages 8 - 14 2 to 4 hours
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In this activity (page 1 of the PDF under SciGirls Activity: Water Slides), learners will whip up some suds with a cup of water and a tablespoon of dish soap until the bubbles are stiff enough to star

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this activity, learners use the design thinking process to design and build their own aqueduct, or water bridge.

$5 - $10 per group Ages 6 - 18 30 to 45 minutes
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This is an activity (located on page 3 of the PDF under Water Clean-up Activity) about the use of reduction agents to decontaminate ground water.

$10 - $20 per group Ages 8 - 14 2 to 4 hours
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Learners act as engineers and design mini submarines that move in the water like real submarines.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners build water-propelled engines from soft drink cans.

$1 - $5 per group Ages 4 - 14 30 to 45 minutes
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In this design challenge activity, learners build a boat that can hold 25 pennies (or 15 one inch metal washers) for at least ten seconds before sinking.

$1 - $5 per student Ages 8 - 14 30 to 45 minutes
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In this activity, learners explore the concept of density-driven currents (thermohaline circulation) and how these currents are affected by climate change.

$10 - $20 per group Ages 8 - adult 1 to 2 hours
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Design a vessel that tests the limits of wind power given a set of off the shelf and recycled materials.

1 cent - $1 per student Ages 6 - adult 30 to 45 minutes
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Electrolysis is the breakdown of water into hydrogen and oxygen. This Exploratorium activity allows learners to visualize the process with an acid-based indicator.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners will test cups full of potting soil, sand, and sphagnum moss to see which earth material is able to soak up the most water.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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In this activity (on pages 18-29) learners explore the impact of the March 24, 1989 oil spill in Alaska caused by the Exxon Valdez tanker.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners make water rockets to explore Newton's Third Law of Motion. Learners make the rockets out of plastic bottles and use a bicycle pump to pump them with air.

$1 - $5 per student Ages 8 - 18 30 to 45 minutes
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In this sunny day experiment, learners measure and compare how quickly light and dark colored materials absorb heat.

$5 - $10 per group Ages 8 - 14 10 to 30 minutes
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Visitors mix water and sodium bicarbonate (baking soda) in a large flask. They then add citric acid to the mixture and stopper the flask. The resulting reaction creates carbon dioxide gas.

$1 - $5 per group Ages 6 - adult Under 5 minutes