The Jewish children who lived in the ghetto were left home unsupervised while their parents left everyday for work. These children weren't childlike in attitude the were mature individuals who had had to be alert and attentive to every situation. They were considered as unwanted entities of no value who could be taken away at anytime by ss officers and killed in gas chambers.
The Ghetto children reminds me to the concept of the survival of the fittest whereas only the strongest and smartest would prevail. Ghetto children tend to be more mature to aspects of the world because they tend to see unfortunate events of poverty, hunger,murder and the day to day struggle in society.