That's great! My daughter also calms down when I comfort her. However, many parents mistake fussiness for hunger (I have seen this in so many couples who are friends with us... their child gets hungry every 30 minutes or so, and dad is trying to bounce him/her and sing to it, as if that's going to work). It is actually cruel to sing to a child when they are hungry and want food. I would not be surprised if the deep-seated food insecurity this instills on children is the source of a lot of our obesity problems