https://www.youtube.com/watch?v=f6sEumwqxz0
https://www.youtube.com/watch?v=YxW_DPPgawI
Many Polish children tried to escape from that horrible place, yet their only possible way out was leading through the Jewish Ghetto, where Jewish Cappo (internal police working for Germans) caught and handed them over to the place where they came from - straight to firing squads.
Hundreds of Polish children are estimated to be executed this way.