"Really," he says turning to look at his son, raising a single eyebrow as he does so. Aang shakes his head. "I don't know, you still look the exact same to me: the splitting image of your grandfather. Well...except for the baby-skin. I'm afraid you've inherited that from me."

Even though he knows she is no where within earshot, Aang knows that somewhere Toph is being smug at his expense.