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

In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients.

In this nanoscience activity, learners discover that it's easy to pour water out of a regular-sized cup, but not out of a miniature cup.

This is an activity (located on page 3 of PDF under Nasturtium Leaves Activity) about surface tension.