Ever since 1999, many pediatricians have clung to one main recommendation about kids and gadgets: you shouldn't show screens to any child under 2 years old. However, they've just loosened that once-firm policy. The American Academy of Pediatrics has softened its guidelines to permit screens for the under-2 crowd in the right circumstances. If your little ones are 18 months or older, they can watch "high-quality programming" (think PBS and Sesame Workshop) so long as you're there to help your kids understand. Any younger than that and you should limit them to video chat, the AAP says.