The support group for the children who lost a parent during WW 2 is A.W.O.N. (American War Orphan's Network) They are a great organization, & I can't say enough good things about them.
In Germany, children both boys and girls were encouraged to join the Hitler Youth for young German boys 14-18 Girls in Germany were encouraged to join the BDM ages 10-14 In Italy and Japan children...