We’ve been talking about cool programs for kids on Tech Shift this week, from camps that highlight STEM skills to the city’s summer learning initiatives. But what’s a parent to do if they can’t send their kids off to an engineering camp? There are lots of learning apps that will feed your kids’ brains, but how much screen time is too much? Two tech-savvy parents, Ken DenMead, owner and publisher of the site Geek Dad and Dakster Sullivan blogger for the site Geek Mom, are with us today to talk about how to balance kids’ screen time in the summer.