[Chip]

I'm not the best at post, but I'd try to make the 2 smiling girls a bit sharper. A high pass filter should help with this.

Also, to bring more attention to those 2 girls, what about cropping off the top to just below the ponytail on #18? It would be an unusual crop, and it would tight at the top of the 2 girls' heads, but it would remove a lot of the extra space in the shot.

My 2 cents.