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Learners work in groups to construct bridges using stale marshmallows and toothpicks.

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

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.

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

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

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.