I'd have to agree with the majority, the kid's a girl.
Now, with that settled, this girl looks about 5 ? Or 6 ?
What do you think ?
There's a pretty solid chance, with her being a girl, this was a kid born about 1924, which would then date the photo around 1929 - 1930 (according to how old I think she looks).
So I guess the next 2 questions are
1) How old do you think she is ?
2) Does that age work (if she's b. 1924) with all this clothing style you've given ?