One idea could be exploring the early life of a new Na'vi character. Maybe they grew up in a different part of Pandora and had unique experiences with the local flora and fauna that are not shown in the movie. For example, they could have a special bond with a rare creature that helps them in a time of crisis later in the story.
First, think about their appearance. Since they are Na'vi, they should have the typical features like big eyes, blue skin, and a tail. But you can add unique details like different patterns on their skin or a special piece of jewelry. For example, a character could have a necklace made from a rare sea shell found only in the Metkayina territory.
One popular theme is the exploration of the underwater world of Pandora. Writers often focus on the unique creatures and ecosystems there. Another theme could be the family dynamic among the Na'vi in this new aquatic environment. For example, how they protect and raise their young in a more water - based setting.
One interesting plot idea could be exploring the relationship between the new characters introduced in 'Avatar The Way of the Water' in a fanfic. For example, delving deeper into the friendship or rivalry among the children of Jake and Neytiri as they grow up. Another idea might be to create a story where a character from the first movie, who was thought to be lost, resurfaces in the underwater world of the second movie and has to adapt to the new way of life. Maybe a story about a Na'vi from a different clan who comes to the Metkayina clan and brings with them a unique skill or knowledge that changes the dynamics of the clan.
First, study the existing characters in 'Avatar The Way of the Water'. Notice how they move, talk, and interact. When creating a new character for your fanfic, base their physical appearance on the Na'vi traits but add unique elements. In terms of personality, think about their motivation. What drives them? Is it the desire to protect their clan, or is it a personal ambition? Make their actions consistent with their motivation. If they claim to love their family, then their actions should reflect that. Also, consider how they would react to different situations, like an attack from the RDA or a natural disaster in Pandora. This will make the character more believable.
First, know the lore of Avatar well. Understand the Na'vi language, their culture, and the world of Pandora. For example, if you're writing about the water part, learn about the sea creatures and their significance. Second, create interesting characters. They don't have to be all - new, you can expand on existing ones. Third, have a clear plot. Maybe it's a story of adventure, or a love story set in this underwater world.
I'm not sure specifically which 'kids the water story' you are referring to. There could be many stories related to kids and water, like a story about kids playing in the water on a hot day, or a story about kids learning to swim.
As I don't know the specific 'kids the water story', I can't say for sure. But it could be kids like Tom, Jerry and their friends if it's a made - up story about kids having fun in the water.