As this is in the critique section please allow me to cast a critical eye and try and explain how I think this shot could have been bettered.
I am left wondering what's going on in this shot. What is your niece looking at, and what is she doing with her left hand. While it gives me the sort of 'intrigue' I tend to prefer in a shot, there seems to be a lack of something to look at to keep me interested and thinking.
If you had perhaps gotten slightly lower and more to the right, you would have benefitted from capturing her face, or at the very least, both her eyes, and more of her facial expression.
Also, while the harsh lighting from the flash has helped bring out the main subject, it has also cast some rather heavy shadows, which, to me, seem too defined.
I think this was an opportunity for a very good shot, but maybe slightly missed by positioning.
Hope this helps
Regards