A major difference I am finding is that people in concentration camps usually wore vertically striped shirts, whereas most often the kid will draw the stripes horizontally.
Examples:
No - the striped uniform dates back to the 1800s. It was formalised by the Auburn Correctional Facility in New York in the 1820s as part of the "Auburn System", the idea being that it would be distinctive and also dehumanising:
https://www.atlasobscura.com/articles/decoding-the-classic-burglar-outfit
The idea was that if a prisoner as part of a labour outfit broke free, he would be immediately recognisable.
