'Child' in the Bible

Am I the father of all this people? have I given them birth, that you say to me, Take them in your arms, like a child at the breast, to the land which you gave by an oath to their fathers?

Then Joshua, the son of Nun, who had been Moses' servant from the time when he was a child, said, My lord Moses, let them be stopped.

So now put every male child to death, and every woman who has had sex relations with a man.