The Giggles

2 things I see: the fact that the background is BRIGHT! and very harsh. I would darken it by lowering the whites just a little bit in tone curve.

Second, there are several bright reflection spots, little more than flecks, around and inside the baby's mouth, as well as one along the cheek and in the left eye. If you're going for (I'm not quite sure what to call it) a "glazed" effect, these work well, but removing them would make it softer and a little more real-looking.

All that aside, you've captured a great expression on the kid's face

(here's my attempt at PSing it)