Disclaimer: I don't own A:TLA.
Reincarnate
He looks so different with hair.
It's thick and brown, as is customary with the water tribe.
"How do you know he's the Avatar?" Katara whispers, trying not to wake the toddler up. The parents, dazed and surprised by the arrival of Katara and the news that their son is the Avatar, gesture silently to the toys that the boy is clutching. In his right hand he holds a toy turtle, and in his left, a rattle swirled with yellow and red. Laying beside him are the two other toys: a propeller and something that Katara can't quite tell whether it's a monkey or a donkey. "Those are his favorites." The mother says, fondly brushing some hair out of her baby's eyes.
Katara reaches over, and picks up the boy. For a moment her mind projects a blue arrow onto his forehead, and she kisses it right where the center would be. Smiling tearfully, she murmurs so that the parents cannot hear: "I've missed you."
Then, she hands him back to the father, and wipes a tear from her eye with the back of her hand. "Be careful," She says aloud. "He's going to be a handful."