(I'm making an attempt to explain why I give any photo 3 or less. Obviously I won't like these photos, but DPC is a place to learn a) about what works in this environment and b) about what other individuals think. Please don't be despondant just because I don't like your shot. Rather than that, if your entry scored low, please try and understand one commentor's reasons.)
These kids are cute, and their smiles are wonderful. I can see true expression here. One reason I gave a 3 was that the challenge asked for shots 'from the ground up', but this one seems to be from more or less the girls' shoulder height. Also, there's too much space around the kids. You needed to crop more. The higlights on the hair are too strong and there's a lack of contrast throughout making this photo feel like a snapshot. This is a cute family album type shot, but not that sucessful for a challenge entry.
Doesn't seem to fit the challenge. Picture is a little washed out. Nice expressions on the kids, but would have been more engaging if they were looking at the camera.