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In this activity, learners build a simple electrolysis device. Then learners use an indicating solution to visualize hydrogen and oxygen molecules in water.

In this optics activity, learners use glass and water to demonstrate total internal reflection (TIR).

In this activity, learners light an LED with five cents. Learners use two different metals and some sour, salty water to create a cheap battery.

In this activity, learners build an electric two-paddle boat using paint paddles, plastic knives, and empty water bottles.