I love the pose of this little boy and his expression, colors are good, IMO he is lost in the frame if he is the focus of the shot the house is bigger than him and so distracts from him.
This doesn't say "Peace" to me... It says "Play". I think I would prefer the building to be cropped out... as it is, it competes with the smaller and more important subject.
I understand your title to the image, however I find the photo to have too much dead space. Maybe fill more of the frame with the boy. The photo just doesn't convey peace to me.