Sorry, there's no rain or attempt to simulate rain. As the shot stands, I liket the centred composition, it works for me with the winding path. Nice focus & pose of subject too.
I think this shot has potential, but the centered composition doesn't work well IMHO. Also, I think you could bump up the color a notch or two. Last thing is that the highlights are a little harsh. BUT, it does successfully establish a mood and it's a shot that most people can identify with.
I can tell you have a great subject, but photographically, this is just another great shot doomed to being just a snap. The two biggest problems are that we can't see his face, so we can't share in his joy at splashing and he's dead center in the frame with all this extra nothing around him.