One idea could be to set the fanfic at Camp Half - Blood. Have Percy's friends plan a surprise birthday party for him. They could organize a special quest just for the occasion, like finding a long - lost gift from Poseidon. The party could include a big bonfire with blue food and drinks, as blue is Percy's favorite color.
First, know the characters well. Make sure Percy and his friends act in character. For example, Percy should be brave but also have his moments of humor. Then, create an interesting setting. It could be at Camp Half - Blood or in New York City. Add some unique elements like magical gifts or challenges. For instance, a gift that has a hidden prophecy. Also, use the mythology well. Incorporate Greek gods and monsters in a fun way, like having a mini - battle with a group of harpies as part of the party entertainment.
Well, you could include a 'Capture the Flag' game like they have at Camp Half - Blood. It would be exciting for the characters in the fanfiction. Also, for the party decorations, having floating Greek columns made of cardboard and painted to look like marble would be really cool. And don't forget about a 'prophecy - writing' station where guests can create their own prophecies, just like in the books.
One great party game could be 'Percy's Quest Relay'. Divide the players into teams. Each team member has to complete a task related to Percy's adventures like running through an 'obstacle course' representing the Labyrinth, or solving a simple riddle like the ones Percy faces. Another game could be 'Demigod Charades' where players act out different demigods and the others have to guess.
You can have Percy as the star of the party. He could lead some of the activities, like the Capture the Flag game. Annabeth could be in charge of the strategic part of the party, like setting up the quests or the monster - hunting routes. Grover could provide some musical entertainment with his reed pipes. And the other demigods could be the guests, each bringing their own unique skills to the party, like a child of Hephaestus could help with any mechanical or construction - related tasks for the party.
One good topic could be Percy's exploration of different parts of the Underworld that weren't covered in the books. It could be about his encounters with new spirits and his attempts to navigate the unknown regions. Another topic might be the backstories of the minor characters at Camp Half - Blood. How they came to the camp, their initial struggles, etc.
Yes, there are many Percy Jackson fanfics that are family - friendly. You can look for ones that focus on adventures, character growth, or friendship within the Percy Jackson universe. For example, some fanfics might explore Percy's further training at Camp Half - Blood, or his new quests with his friends.
A 'Capture the Flag' game but with a Percy Jackson twist. Instead of regular flags, have one team's flag be the Golden Fleece and the other team's be the Helm of Darkness. The area could be set up like the Camp Half - Blood grounds with some obstacles. This would add an exciting element as players try to protect their precious item and capture the other team's.
For example, in a game of 'Musical Thrones'. Instead of normal chairs, you can have thrones representing different gods. When the music stops, players have to sit on a throne and then quickly say a characteristic or power of the god that throne represents. If it's Poseidon's throne, they could say 'I can control water'.
In these fanfictions, often there are new relationships or developments in existing ones. Say, a new demigod arrives at the party and catches someone's eye. Or Percy and Annabeth might have a little argument during the party that leads to a deeper understanding of their relationship later. Also, the parties can be a place for secrets to be revealed. Maybe a character has a hidden power that they show off during the party activities.