I'm going through the entries, stopping at those images I feel have had the benefit of an unconventional eye and dwelling a little longer to try to see and appreciate what you saw. This is one of those images.
Positives: Fantastic light you have here and your editing has made the most of it. A nice moment captured - I can almost feel the child's excitement from here. Your decision to use a vignette was, in my opinion, inspired - it really, really suits the image.
Critical stuff: Perhaps it need straightening a touch?
Just joy unbounded ... his of course; yours (unquestionably, given how sympathetically and beautifully you have preserved the moment here); and my own joy too, because this is now on my imaginary wall of 2010 excellence and I will be able to enjoy it anytime I want. Thank you.