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In this activity, learners are challenged to design a planktonic organism that will neither float like a cork nor sink like a stone.

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

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