Fanfiction about the backstories of some of the minor characters can be really interesting. For instance, exploring the life of Neville's parents before they were tortured by Bellatrix. This can add depth to the overall Harry Potter universe without going into inappropriate territory. Another idea could be a story centered around the friendship between different houses, like how students from Gryffindor and Slytherin work together to solve a mystery within the castle.
One great idea could be stories that explore the further adventures of the characters after the end of the series. For example, how Harry, Hermione, and Ron continue to protect the wizarding world from new threats. It could also involve the next generation learning magic at Hogwarts and facing their own challenges in a way that stays true to the original values of the series.
Stories that focus on the magical creatures in the Harry Potter world are also family - friendly. You could write about a young wizard's journey to study and protect thestrals, or how Hagrid discovers a new and rare magical creature. These types of fanfiction ideas can expand on the rich and wonderful world that J.K. Rowling created while remaining appropriate for all ages.
Some positive fanfiction concepts could be centered around the creation of new spells by the students. Maybe a group of Ravenclaw students collaborate to invent a spell that can help in environmental protection in the magical world. Or fanfiction that focuses on the relationships between different houses, like how Gryffindors and Hufflepuffs work together on a project to improve the Hogwarts gardens. These ideas stay true to the positive and family - friendly nature of the Harry Potter universe.
Another idea is to write a fanfic about the magical creatures of the 'Harry Potter' world from their perspective. Maybe a story about how a hippogriff views the wizarding students who come to visit it, or how a house - elf dreams of a different kind of life while still serving their wizard family.
A story about Harry Potter's first Christmas at Hogwarts. It could be about how he experiences the magic of the holiday in the wizarding world, with the floating candles, delicious feasts, and special presents. It would be a heartwarming story full of the joy of the season.
One idea could be Harry starting a magical gardening project at Hogwarts. He could be growing all sorts of magical plants and using them for potion - making and to beautify the school grounds. It would be a fun and positive story.
A family - friendly plot could involve Harry and Edward accidentally swapping powers. So Harry has vampire - like abilities for a while and Edward has some magical powers. This leads to a lot of comical situations as they try to figure out how to use their new - found abilities and also how to swap back. Also, they could be brought together by a prophecy that foretells of a great event that only they can prevent together. This would involve them traveling to different places in both their worlds to find the clues and items needed to stop this event from happening.
One common family - friendly theme is the exploration of different Hogwarts houses. For example, stories that show how students from different houses interact and learn from each other. Another theme could be the backstories of minor characters. For instance, Neville's growth and how he overcomes his insecurities can be a great theme for a fanfiction. And of course, the discovery of new magical creatures and spells within the Hogwarts grounds is also a very family - friendly theme.
One idea could be a fanfic where Petunia discovers a hidden letter from Lily that reveals more about their family history and the magic in their bloodline. This could lead to her having a change of heart towards Harry and the wizarding world.
One idea could be a fanfic where Luna teaches Harry about some of the more unusual magical plants and their uses. It could be a story of discovery and learning. Another could be a fanfic set during the holidays where Luna invites Harry to her home and he experiences the unique lifestyle of the Lovegood family. And perhaps a fanfic where Luna and Harry work together to organize a school event that promotes acceptance of all kinds of magic and magical beings.
A 'lord' of magical art could be an interesting concept. In the fanfiction, this character would be in charge of all the magical art forms in the wizarding world, such as the paintings that move and the sculptures that can come to life. They could use their power to bring more life and beauty to Hogwarts, like creating amazing murals that tell the history of magic. This would be a family - friendly take on a powerful character concept inspired by the 'lord' idea, without any inappropriate elements.
One idea could be that the tentacles belong to a magical plant. The female Harry Potter character discovers this plant in a hidden part of Hogwarts' gardens. The tentacles of the plant are actually a key to unlocking a secret passage or a hidden magical power. So she has to figure out how to interact with the tentacles in a non - harmful way to gain access to this new discovery.