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

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

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

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.