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    04:15
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  • How to keep your child safe while playing sports | Wellness TODAY

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Do crosswalk buttons REALLY change traffic lights?

00:57

The buttons to close elevator doors don’t really do anything, it turns out, and there are other switches of dubious utility: button at crosswalks and thermostats in offices, for example. (TODAY’s Al Roker adds another one to the list: The belly button!)