The boy in the striped pyjamas

My novel in set in Germany and in the 1940's
There was a war between Germany's and Poland
Bruno the 9 year old child and his family have been forced by the fury to move out to a dreadful place called the out with.
Bruno was a very happy child when he lived in Berlin he had plenty of friends and family who surrounded him.
He lived in a very nice house and "if he stood in his tippy toes he could see across Berlin"
Once he moved to Berlin he didn't have any friends he didn't know anyone all and all he could see was hundreds of men and children wearing the same boring striped pyjamas