Kya always takes the blue crayons. She says that they "feel right", as Mother takes her young daughter's hand in her own and teaches her to draw circles and waves that spiral around each other.
Bumi watches.
Later on, once Tenzin is old enough, they let him join in on their coloring sessions. He stares at the box and Bumi stares at him, and before long, his younger brother has pairs of deep brown and orange crayons clutched in his tiny fist.
"I want to use these ones, Daddy!" He says, a toothy grin on his face. Father lets a smiles spread across his face and plucks one from his grasp. "Here son, let me show you," and he draws twirling lines on the paper while Tenzin gawks.
Bumi watches.
Later on, it will be night, and Bumi will have scrolls spread out around him on the floor of his room and the crayon box to himself – and he will draw.
He will draw the circles of his father and the waves of his mother and he will let the tears run down his face, because no matter how hard he tries, the colors just don't "feel right".
Aang and Katara's cloudbabies are all going to be awesome.