1) the post the boy is next to is distracting.
2)cute, but could have benefited from some fill flash.
3)cute, but looks soft. High ISO?
5)half her face is blown out, otherwise a good moment.
i'm torn...
#1: like the composition, but to me the vignette doesnt work where its at on here... too much sun on their hair and the vignette is countering it.. to me a bit distracting
#2 i do not like this perspective and the overall pic... the black and whites dont work on this and appears, almost scary
#3 is good, but seems soft to me, and usually i like full frame shots like that, but.. even though an infant wouldve been much better if was looking directly at the camera
keep shooting and all..
i would try to focus on compositions mostly.