Another plot could revolve around the challenges of raising a demigod baby. Percy and Annabeth would have to protect the baby from various mythological threats. They might face monsters that are after the baby because of its potential power. Also, they would need to figure out how to educate the baby about their demigod heritage in a world that is both dangerous and full of wonder.
A third plot idea could be that the baby is prophesied to be a key figure in a coming war between the gods. This would put Percy and Annabeth in a difficult position as they try to keep their baby safe while also preparing it for its possible role. They could seek the help of their old friends from Camp Half - Blood, and together they would train the baby and discover new abilities that could change the fate of the demigod world.
Another plot could revolve around the challenges of raising a demigod baby. Percy and Annabeth have to deal with the baby's unpredictable abilities while also protecting it from the dangers of the demigod world. They might seek advice from their old friends like Grover, who could offer some unique insights.
One idea could be a fanfic where Percy and Annabeth go on a new adventure together, facing a powerful new monster that has emerged in the world of the gods. They have to use their combined skills and knowledge to overcome it.
The fanfic could be about Percy and Annabeth's kids participating in a friendly competition within the camp. It's a series of challenges that test their physical strength, strategic thinking, and teamwork. Through this competition, they learn more about their own abilities and the importance of working together, while also having some fun rivalries with other demigod kids.
A great plot idea is that the child has a special connection to the sea, like Percy, but also has Annabeth's wisdom. So they use this combination to solve a mystery that has been plaguing Camp Half - Blood for years. For example, the mystery of why some demigods' powers are fading. Another could be that the child gets sent back in time and has to interact with their parents when they were younger. This could create some really interesting situations and challenges for the child.
A possible plot could involve a magical tournament where Percy and Annabeth are on opposing teams. Their rivalry gets in the way at first, but as the tournament progresses and they see the real threats emerging, they start to cooperate in a more covert way to ensure the safety of everyone involved.
The relationship could start with Percy and Annabeth being overprotective parents. Percy might be constantly worried about the baby's safety near water, while Annabeth would focus on teaching the baby knowledge and wisdom. As the baby grows, they could start to have little adventures together. For example, the baby could go on a mini - quest with them around Camp Half - Blood, which would strengthen their bond.
One idea could be that Percy's baby sister discovers she has a unique power that even Percy doesn't have. For example, she might be able to communicate with the spirits of the ancient Greek heroes in a way that gives her special knowledge. Another plot could be that she gets kidnapped by a new enemy who wants to use her to get to Percy. Percy then has to go on a dangerous quest to rescue her, facing all kinds of mythical creatures along the way. A third idea is that she is actually a reincarnation of an important figure from Greek mythology, and as she grows up, she starts to remember her past life and the secrets it holds, which causes a stir in the demigod world.
One idea could be Percy as a baby having small adventures in the underwater world of Poseidon. Maybe he befriends a baby sea monster. Another could be Poseidon trying to protect baby Percy from the other gods who are suspicious of this half - god baby.
In a fanfic, perhaps Percy and his friends accidentally stumble upon Medusa's lair while on a quest. But instead of immediately attacking, Medusa offers them a deal. She says she will give them a valuable clue to complete their quest if they help her get revenge on one of the minor gods who wronged her in the past. Percy and his friends then have to decide whether to trust Medusa or not.
One interesting fanfic could be where Percy and Annabeth get transported to a modern city with no knowledge of the demigod world. They have to figure out how to survive and also rediscover their powers. It's a fun twist on their usual adventures.