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In this activity, learners help a poor cartographer color in the countries on a map, making sure each country is colored a different color than any of its neighbors.

In this hands-on activity, learners will construct a scuba diver that can float in order to explore how sea creatures stay neutrally buoyant in the ocean and to see what kinds of forces might be influ

In this design challenge activity, learners invent an emergency shelter that can fit a person and is sturdy and quick to build.

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