What an adorable funny expression. He seems to be really enjoying that tall grass. This is the sort of photo every Grandmother would treasure. I like the textures in this image -- the soft hair, and the wispy grass.
Certainly gaining points for capturing such a wonderful expression and sense of vitality and fun. The composition is god, and the setting a really good choice. It is such a shame that there is so much visible noise/JPEG artifacts, as it does detract from the image.
I like the setting, the composition, and the contrasting orange shirt. Face seems a little unsharp, and the lighting is a little harsh and not very dramatic.