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In this water activity, learners discover ways to move water across the water table.

In this activity (located on page 6 of the PDF), learners explore the ways people access water in their homes.

In this activity, learners use tinfoil to build and test their own boats - which designs will float, and which will sink?

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

In this activity, learners discover how solar energy can be used to heat water.

Learners make a refrigerator that works without electricity. The pot-in-pot refrigerator works by evaporation: a layer of sand is placed between two terra cotta pots and thoroughly soaked with water.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

Learners act as engineers and design mini submarines that move in the water like real submarines.

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

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.

No glue is needed for learners of any age to become marshmallow architects or engineers.

This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.

In this activity, learners consider the water features they might enjoy at a community park--a pond, brook, water playground (or "sprayground"), or pool--and what happens to the water over time.

In this activity about saturation (page 1 of PDF under SciGirls Activity: Sand Dunes), learners will build a series of sand castle towers using a 16 oz cup.