If one of your kids gets up from the kitchen table and says "BRB," don't despair. He or she will "be right back." And, if you tell a joke and the response is "LOL," that's a good sign. It means, "laughing out loud." In case you haven't noticed, your kids are speaking a new language. It probably won't count as a language requirement when they apply for college, but it does help them communicate with other kids via chat rooms and instant message programs...