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This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

Learners discover that soap can be used to power a boat. Learners make a simple, flat boat model, put it in water, and then add a drop of detergent at the back of the boat.

In this activity, learners construct cars that are powered by hand-made, electric propellers.

MarsBound! is an engineering simulation activity in which learners use realistic techniques to plan a mission to Mars.