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If you are looking for a simple but entertaining way to demonstrate potential energy, the toolbox racer does the trick. It uses the energy in the measuring tape’s spring to move the racer forward.
Requires white glue, sold separately.
“I know how impactful STEM can be for the entire school, the entire school culture. I’m all about the whole child. It’s not just about reading or writing or math. It’s about every child has some talent somewhere; you just have to find it.”