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Watercraft
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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.
Marshmallow Models
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No glue is needed for learners of any age to become marshmallow architects or engineers.
The World's Water
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Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.