C&C per req:
(In future, please 'stack' your images vertically and number to facillitate critique)
Reading L->R, top to bottom:
1. Cute, decent lighting, good focus; I would prefer to see this taken from a lower angle; more into her eyes than down on her, and perhaps crop the RH side, just above the bottom of her shirt. I would like get rid of the grass as well, but I don't think that will work.
2. WB adjustment! Stat! This is very yellow/green, and again, should have been shot from a lower perspective. Additionally, it would have benefitted from fill light as it is somewhat under-exposed as well as a lower shooting position and a tighter crop.
3. Cute; I would crop off most of the RH side behind the subject as the fence rails serve as leading lines which lead the eye out of the shot. The onles leading in are great.
4. A great shot of the child in pink, hwoever the expression on the face of the child in white looks like she'd rather be anywhere but where she is. Additionally, consider shooting with longer glass and larger apertures so as to have less depth of field in the image and render the backgrounds less distracting.
5. The $$ shot! You've captured a great moment here, and there's really nothing not to like about this image. I would sugget however tweaking the monochrome conversion just a bit more; I think with some richer, deeper blacks this would be simply outstanding!
Just my $00.02 worth - your mileage may vary.
~John