The doorbell rings, I open the door and nobody is there. As scripted, I exclaim in surprise that the doorbell rang but nobody is here. On cue, a 5-year-old in a puffy pink coat barrels around from the side of the porch squealing with laughter. She runs into the house, throws her coat toward the hall tree (but not exactly on it) and races to the front room carrying a stuffed white puppy dog in one arm and dragging a tote bag filled with books with the other arm. She will be hanging out with us for a few hours today and has brought some early-reader books to read to Grandma. She climbs onto the …