No one tells you that becoming a parent means keeping a lot of dirty little secrets. Like that time you wiped your kid’s booger on the underside of a park bench when you were out of tissues. Or that sometimes (ok, at least once a month) an entire weekend goes by without them brushing their hair. Well, here’s another one that parents don’t like to cop to: Their kids watch a lot of digital content. According to research presented this year at the Pediatric Academic Societies Meeting, 20% of the children in the study used a handheld device for an average…

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