I am of the personal belief that children make for some of the best practice there is, you just never know when they are going to go off and be cute on you spontaneously.
Like the setup. If her vest was a bright color one of those high saturation shots would work here as well.
I am only an amature, but here are my comments: I like the placement, but a slight crop on the left may enhance the picture more (take out the cornerof the brick wall). I think the picture is sharp, has good contrast, and captures a precious moment.
I am looking to get better so any C&C is appreciated.