The effects of too much screen time on kids can be serious: lost sleep, poor grades, social maladjustment, behavior problems, obesity. This list goes on and on. Then again, what are we supposed to do? Cut kids off completely? The answer, of course, is no. Rather, finding a healthy balance is more appropriate says Dr.Dimitri A. Christakis of the Seattle Children’s Research Institute, a leading expert on the effects of screen time and media on young people. Instead of cutting kids off, he says, parents and grandparents need to be smart about how they allow youngsters to use tech. And you can hear on this show just how important kids consider tech when PC Mike…