Canon

“That is a volcano, that is a VERY SMALL VOLCANO, how - young lady, how did you make this? Baking soda and food coloring? MARVELOUS!”

the kids would love him.

Never have I ever loved anything more than I love this

All the muggle teachers would think he was being so adorable, “pretending” not to know how potato batteries and mini-volcanoes work, fawning over the hard work the kids did on even the simplest the projects. And he comes every year, because after the kids have aged out (”gone on to some boarding school in Scotland,” the teachers say over bad coffee in the break room, “they didn’t seem the type”), he gets an honorary invitation to the fair every year, because he never stops making the kids feel smart and good. 

“And this airy-o-plane, it flies by means of a… rubber band? Did I hear that correctly? No magic at all? Doesn’t flap its wings like a bird? MARVELOUS! What an ingenious method of flight!” *looks around* “You, sir! With the ribbons! This child deserves one of those prizes!”

@deadcatwithaflamethrower

This is so wholesome. 

Arthur Weasley, as the Science Fair attendee we all deserve.

After a couple years Arthur Weasley brings his own ribbons. They shimmer in a way that makes everyone wonder what kind of ink he uses—“secrets!” he tells anyone who asks—but they’re beautiful. They’re coveted even more than the official ribbons, because they remind you that while he was heaping praise on you, you felt magical.

This is one of the best HP headcanons I’ve ever read.