Starting today, families throughout Massachusetts will swap their digital entertainment for the annual challenge of "Screen-Free Week." The global event encourages people to participate in whatever way makes sense, whether it is going without an app or device for the whole week or even just a day. Jen Kane, coordinator of Screen-Free Week for the nonprofit Fairplay, said the goal is to reduce time spent on screens for entertainment. "Like maybe for the week, don't have phones at the dinner table, not have phones in the bedroom at night," Kane suggested. " ...