One of the benefits to my older daughter going to school was that, at long last, my 18-month-old child would finally get some undivided attention. She'd no longer have to go along for the ride in whatever the oldest wanted to do, and I thought that was nothing but good news. However, to my surprise, that first week was perhaps hardest on — no, not the child setting off on a new adventure — the one who was left behind. I hadn't put any thought into preparing my little one for this change when she probably needed it most.