Second and third photos are great. I prefer the second of the bunch, really sharp and really clear. The white areas in the third seem a bit blown out, and it looks like you may have missed the focus in the eyes in the first photo.
You are right about the first one. It is pretty tough with that guy to get a picture, if you know what I mean. I snuck up on my nephew in the second one so that is a completely nature look. Thanks for the input!!