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Here is a very important demonstration on why it's so important to wear helmets when doing any kind of high speed activity. A third grader's science fair project tested four different types of helmet: football, ski, skateboard, and bicycle. Each helmet had a honeydew melon in it. The helmets were dropped off a twenty-foot-high balcony onto concrete. The bicycle helmet was the only helmet that left the melon unharmed.
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