Baby Harry growing up on the Hogwarts grounds.
The paintings on Baby Watch when he learns how to crawl.
The ghosts watching him during naptime.
All the teachers reorganizing their class schedules so someone can watch Harry.
They’d have to refit the charms on the school when he hits his terrible two’s because he somehow can get the stairs to move at his whim, and he once stranded a group of 5th year Ravenclaws on a landing for two hours.
Four year old Harry *loving* Professor Flitwick and his charms, floating fairy lights and flower fish.
Two year old Harry babbling in Parseltongue and accidentally finding the Chamber of Secrets.
The Quidditch teams argue over who gets to teach Harry how to fly only for McGonagall to find out one day and give ALL of them detention.
Harry catching a big and being miserable and McGonagall shifting into ac cat and curling up and purring next to him to settle him down.
Harry getting to meet Remus.
Summer vacations to Scotland, Harry knowing every inch of Hogwarts like the back of his hand, Harry growing up as keeper of Hogwarts from the start.
Harry being utterly destroyed by the idea that when he *really* gets to go to Hogwarts (nevermind he’s been sitting in classes since he was five) he’ll have to choose a House.
Harry at 11, standing in the Great Hall, vehemently denying the Sorting Hat’s attempts to put him anywhere.