Every year, we rent a little apartment in San Rafael, CA, to be near our daughter, son-in-law, and grandchildren for about three weeks. This time, on the last night of our stay, the 13 year-old asked if he could have a “sleep over” with us. We were, of course, delighted. His parents dropped him off. He appeared at the door with a small suitcase and a bag containing some homework, a Monopoly game, and a cherished stuffed animal. We passed the evening watching TV together (he loves Internati…