Maybe Harry Potter could teach the preschoolers magic tricks in a simple and safe way, like making feathers float. He could also tell them stories about Hogwarts and his adventures, inspiring their imagination.
Well, Hagrid would be a great addition. He could bring in some friendly magical creatures for the preschoolers to see, like baby owls or small unicorns. The kids would be thrilled to meet them.
Friendship is a common theme. Just like in the original series, even as preschoolers, the characters form strong bonds. For example, Harry, Ron and Hermione might be shown sharing their toys or helping each other when they get lost in the preschool. Another theme is discovery. The preschoolers are discovering their magical abilities for the first time, like Harry realizing he can make a flower levitate.
Snape could also be the one to teach Harry a lesson. Given their complex relationship in the original books, in fanfiction, Snape might see an opportunity to put Harry in his place. For instance, if Harry fails in a potions class because of his carelessness, Snape could use this as a chance to teach him about discipline and attention to detail.
Maybe Harry would teach Tom about the consequences of dark magic. Since Harry has faced Voldemort multiple times and seen the destruction caused by dark spells. He could use these real - life (well, in the wizarding world) examples to make Tom understand that there are other paths in magic that are more positive and life - affirming.
The regular Harry Potter fanfiction might have complex storylines and adult - like themes at times. But harry potter muggle preschool fanfiction is all about simplicity and the wonder of a child. The language used is often simpler too. It's like seeing the magical world through the eyes of a three - or four - year - old who doesn't understand all the rules and just wants to have fun with the idea of magic.
Perhaps Harry is teaching Potions in the fanfiction. Since he had a bit of a rocky start with Potions in his student days, he could be a very understanding teacher. He might encourage students to experiment more, which is different from Snape's strict methods. He could also share stories about how important Potions were in his adventures, like when they made Polyjuice Potion. This would make the class more interesting and inspire students to take Potions more seriously.
If Harry Potter teaches at McKinley in fanfiction, it would be a total chaos in a good way. The students there are used to a normal school life. Harry would bring in Quidditch and the students would be thrilled. He could also teach them about the different magical creatures, which would be a whole new world for them. And of course, his Defense Against the Dark Arts classes would be legendary.
Obviously, Harry Potter is the main character as he is the one doing the teaching. His students would also be important characters. This could include well - known characters like Neville Longbottom, who might struggle at first but then thrive under Harry's teaching. Ginny Weasley could also be a prominent student in the class, showing great skill and courage.
In the fanfiction, if Harry Potter teaches at Ouran, he would probably struggle with the very different culture. Ouran is all about high society and luxury, while Harry comes from a more humble background. However, he could use this difference to his advantage. He could introduce the values of loyalty and friendship that he learned at Hogwarts. He might form a club where students can learn about different forms of courage, both the Gryffindor - like boldness and the quieter, more patient courage that comes from facing everyday challenges. This would be a great way to bridge the gap between the two very different worlds he's now a part of.