|[Note Guidelines] Photographer's Note|
|Naughty Urvi in mood..., She was riding her tricycle in circles when i captured this snap...|
I don't know what lens, focal length, or aperture you used here - without that info it's very hard to offer a helpful critique.
From my observation, the focus is on the strap of her top, forward of her face, hence the blur of her smile and eyes.
I don't know what sort of camera you were using, but some cameras have an active sports-mode focus, which follows the subject and keeps it constantly sharp, so you can successfully take snaps like this.