[This not only assures Aang, it amuses him, and he gives a small laugh.]
Oh, that's good. I think I actually like that you're old. [The thought that he'd have a son who could be so long-lived... hopefully even moreso than himself, it makes him feel really proud. He pauses to collect more of the thoughts related to his son that have been rushing through his head.]
And... I've heard a lot about you, Tenzin. [It was still so weird, after hearing that name tossed around a lot, that it now has a physical form that he is talking directly to. This is his middle-aged son.] That you're doing a lot to keep our culture alive, and that you trained the Avatar to learn Airbending.
[Action]
Oh, that's good. I think I actually like that you're old. [The thought that he'd have a son who could be so long-lived... hopefully even moreso than himself, it makes him feel really proud. He pauses to collect more of the thoughts related to his son that have been rushing through his head.]
And... I've heard a lot about you, Tenzin. [It was still so weird, after hearing that name tossed around a lot, that it now has a physical form that he is talking directly to. This is his middle-aged son.] That you're doing a lot to keep our culture alive, and that you trained the Avatar to learn Airbending.