Remember staying up all night assembling a train set, bike, or doll furniture to surprise and delight your kid at first sight? If you're giving your kid a smartphone or tablet this year, you'll need to put in some prep time, too. The first device is a milestone that signals a new chapter in your kid's life, and gives you both the opportunity to discuss raised expectations. With our basic setup tips, rule-setting ideas, and essential apps, you'll avoid some common missteps and set your kid up for success. Pre-holiday homework isn't every parent's idea of a jolly good time, but ...