I think as far as cropping goes, that's pretty much up too the person that shot it because many times like mentioned there is a story that is trying to be told, life style type shooting. I pretty much do all lifestyle, of my grand children.
Anyway, I think the photo's are adorable! It does appear to have a few hot spots, but nothing serious and I am betting you could bring those down just a tad in lightroom if you have it.
My personal opinion on the top as far as cropping goes, it could be cropped a bit more on the top just to remove some of the tree trunk more so it doesn't dominate the whole picture, but that's just personal. I am sure whoever this child belongs too though will love these photo's.