"Peter, you're twelve years old. I'm ten. They have a word for people our age. They call us children and they treat us like mice."
"But we don't think like other children, do we, Val? We don't talk like other children. And above all, we don't write like other children." (9.61-62)
He was a child. He was young.
No he isn't, thought Ender. Small, yes. But Bean has been through a battle with a whole army depending on him and on the soldiers that he led, and he performed splendidly, and they won. There's no youth in that. No childhood. (12.194-195)
So, after wandering through the tunnels for a little while, he went to the mess hall and ate breakfast near a few marines who were telling dirty jokes that Ender could not begin to understand. (14.312)