A and I have a baby boy. He is perhaps two or three months old and sits on the floor. A is playing with him and rocking our baby with great motion from side to side and then back and forth - as if sitting in a rocking chair that rocks in all directions. I point out that it isn't necessary to rock in such large motions, that smaller movements will still feel fun for the baby. We sit on the floor with our son and he makes baby noises, and then he says a word. It is a grown-up word (not a swear word but a word only grown ups would use), and it is so surprising to hear it, and of course wonderful and exciting. I hold our baby and notice how strong his hands are as the small fingers grab me. He smiles widely and does that baby-rattle with his arms and legs, and we continue to play with our baby, A and I.