Nice shot. Just my two cents but perhaps crop a bit off the top and bottom to bring them in "closer" and also while I realize the kite needs string just for some reason troubled by the fact that it comes off the bottom of the kite and goes down and seems to disappear into the grass then then reappears on her pant leg. I would be tempted to remove all visible string from her pants.
Again just my two cents....like the shot and their concentration on the kite etc!
It is perhaps too contrasty with both the whites blown and the shadows blocked. If you shot Raw you might improve it in conversion, if not, shadow/highlight might be good
