Look good. You may want to adjust the color a little bit. Make it a bit more saturated I guess.
Try cropping the first one where you can only see the heads of the kiddos. Might be an interesting shot. Less distraction... the focal point is obviously the expressions on their face, which are coolishly contrasting.
The second photo is similar, the expression is what you were going for... background uninteresting or says the kid is in a pack of moms. If the kid was sitting in the back of a boat or like on a school bus or something, the background could tell a story.
I always think its cool to get down to the child's level and slightly lower.... like these...