One-shot IX: South Pole.
Izumi and Tenzin had gotten up incredibly early that day, even before their parents because it would be the first time that they would go on a trip and visit their aunt Katara. They had taken Izumi's bag to fill it with stuffed animals and toys, although when it was time to leave, they were not allowed to take it with them, at least they could fly in Appa and that was enough for them.
The trip had been long, and the kids fell asleep after the excitement of flying in the middle of the clouds passed, but Zuko woke them up when they were near Kyoshi Island to dress up his kids with cotton coats for the cold. Until they reached the south pole and after going down with the help of their parents, they entered at the not so small village, now it looked a little more like the Northern Water Tribe. With their parents, the twins ran to their Aunt Katara's house, but they were wearing so many layers of coats that they were not able to move quickly.
They arrived with their aunt and entered at her house as if it were theirs, they also rushed to greet their aunt by hugging her and she helped them remove some of the many coat layers that Aang and Zuko had put on them, leaving them on the hall floor. They ran up to their aunt who greeted them filling them with kisses and hugs.
"What about your parents?" Katara asked curiously as the kids sat at a small table where their aunt offered them some hot tea.
"We came here alone" Izumi replied proudly.
"We brought Appa and flew around the world."
"That sounds interesting, what else did you do?" Katara asked, not believing they were alone, she could only think that her friends were fixing some things with Sokka.
"We saw... Kyoshi Island" Izumi replied trying to remember something from the trip.
"What about the kids?" Tenzin asked changing the subject, wondering where his cousins were.
"They are out with their father" suddenly it is heard that someone entered and to the kids surprise, it was not their cousins but their parents.
"We came here alone" the twins said in unison, starting to laugh.
"I noticed it, kids" Zuko said approaching to kiss his children foreheads while Aang went to greet Katara "I guess you had an adventure"
"Yes" the kids almost yelled.
The adults started talking about things that were boring to Izumi and Tenzin who ate cookies ignoring them, until Katara told Kya to teach her uncle Aang her new waterbending moves; so, they went out again to walk through the snow and look for Bumi and Kya who had a snowball fight with their father, although this one stopped when they saw Aang and Zuko approaching to them. Bumi and Kya greeted their little cousins and Bumi told the twins that they could go see the otter penguin while his sister trained with their mother.
And so, they did while Zuko ran after his children who chased the otter penguins with fish in their hands, Aang helped Kya with her waterbending techniques; however, Sokka also showed up and offered Bumi if he wanted to learn how to use the boomerang. When Bumi threw the boomerang with more strength, he accidentally hit Tenzin on the back of his neck causing him to fall face down on the snow, in addition to the toy bouncing off his head and hitting Izumi on the forehead who also fell on the snow. The boy started laughing as the other adults gave Sokka a bad look.}
"At the end it comes back" it was the only thing he could say between laughs.