Regarding Fred and George’s fireworks…
Professor Flitwick, What was the Charm Fred and George Weasley used to create a swamp in the hallway when they made their exit? I know you kept part of it because you thought it was a great piece of Charmwork. Is it still there though, after the Battle of Hogwarts? And have you kept any of the fireworks they used? Do you happen to know the Charm for making those? Thank you for your reply, a Ginger Gryffindor