Nice lighting, and good job on the background. I am thinking though, that maybe you got a little too many props going on. I find myself thinking the shot is starting to get a little busy, and the framing/composition of the shot seems geared more towards the props, and less about the boy, who should be the main point of the shot, obviously. It just seems like too much of my attention is being drawn away from him.
Interesting idea and a cute model. A few too many toys though have made the scene quite busy. Putting the hat on him would have been reeeeally cute btw.
A lovely idea and pleasingly photographed. The creases in the cloth by the horses leg are a little distracting, and I would prefer a square crop, but aside from that I like it.