I decided to see what I could do with photoshop, here it is.
I think our attention had to be drawn to the boy in the middle. So I kinda pushed him to centre. I don't think it is not good to put a subject in centre position, well it all depends.
Converted it to B&W, to get rid of the colourless impression of the shot.
Well, these are what I found I could do. Maybe higher skilled people could do better. haha. I am also learning, I have got more things to learn than teach actually, haha.