Aang With Hair
How did Aang grow his hair from Avatar?
I forgot to watch some episodes of Avatar and I don't know if I suddenly grew my hair, you know?
Well, they all grow hair. And whenever his hair grows big, he has a head, as seen in Book 2 during construction 2. And since he spent a lot of time from Book 2 to Book 3, he didn't hold his head for long, so his hair grew.
Ang with hair
This page can help you.
How to grow hair from the body of the avatar?
I forgot to watch some episodes of Avatar and I don't know if all of a sudden my hair grew, you know?