What makes this shot great in my opinion is that it's not posed. It really makes you wonder what he's thinking and what he's seeing. It's well composed and I like the color treatment. It's a great image that I'm sure you'll never tire of looking at as he grows up. Definitely frame it.
Only critique would be that the eyes are very dark, it'd be nice to have a bit of color/detail there, flash at the time might have helped and there may not be much you can do about the detail now. It doesn't detract from the shot but it'd make an awesome shot just that much better.
Thanks for sharing.