The research comes from the University of Pennsylvania and the University of California Irvine. And it shows that kids who get 30 to 60 minutes of sleep midday are at least three times happier. They also have more resilience and self-control in addition to excelling academically and have a higher IQ. "Many lab studies across all ages have demonstrated that naps can show the same magnitude of improvement as a full night of sleep on discrete cognitive tasks,” says UC Irvine sleep researcher Sara Mednick.

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