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Learners take on the role of environmental engineers as they design water filters.

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

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

In this design-based lesson, learners study flood dynamics as they modify a riverbed with blockages or levees to simulate real-world scenarios.

In this activity (on pages 29-35), learners examine water pollution and filtration.

In this activity, learners build water-propelled engines from soft drink cans.

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, learners create a biosphere in a baggie.

Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.