Social media Web sites, such as Facebook and Twitter, have become nearly inescapable facets of modern life, particularly for kids. And a new report suggests they can have real benefits and risks for children.

These sites, and virtual gaming worlds, allow users to interact with each other and they are where children and adolescents are spending a lot, if not most, of their free time, according to a report on the impact of social media just released by the American Academy of Pediatrics.

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