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In this activity, challenge learners to predict and investigate how many water drops they can fit on one penny.

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.

Conduct a simple experiment to explore how temperature changes can make things expand or contract.

In this demonstration, learners attempt to get a large coin through a small hole, the size of a smaller coin.

In this activity, learners balance chemical equations and discover the law of conservation of mass. Learners use coins to model molecules to balance the equations.