ADORABLE outfit and setting in shot #1. I wish you would have included the balloons instead of eliminating them from the composition and instead showing us those trees and the lawn behind him--including the balloons could have really made this simply an incredible shot. It's still good, but the cropping off of the balloons in favor of including out of focus background elements on the left and on the right hurt the shot. Pulling back a bit farther would have made a nice horizontal composition, if the balloons were shown. He has a cute body position in shot #1, and good eye contact with the viewer.
I'm not quite as sold on the second shot. It's just not quite as "cutesy" as the first shot is, and the big orange kiddie slide is pretty overpowering. He's looking down and his eyes are just dark shapes, so there's no engagement with the viewer, and the bubbles are not really in good position. THe single big bubble right on the edge of the frame is not helping. I've used bubbles and kids before--and it's tricky....weather and wind and lighting need to be right, and the bubbles move around a lot.