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In this activity, learners make water-walking critters using thin wire, and then test how many paper clips these critters can carry without sinking.

In this activity, learners capture and observe planaria, which are worms that eat tiny pond critters.

In this activity, learners use found natural materials to create a water haven for bees and other insects.

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

In this experiment, learners examine the way oil affects bird feathers and test different cleanup methods to find out which works best.

In this experiment, learners work in pairs to create two gloves -- one that contains a layer of shortening (blubber) inside, and one that doesn't.