Fern took Professor Hadley's offer to loan out mittens as a challenge. She didn't need any gloves. And forget about the jackets. She was a Quimbley, and Quimbley's were hard core (also, she had just learned Siccus Airous in Herbology, so that helped). Bring it on, chilly weather, bring it on!

As for the question, the 11-year-old had no clue, so at first she just listened to the other answers. Minnie's one about hand warmies made her giggle. But the one about the radiators - Fern's eyes opened wide in horror at the very word. What were radiators!? They sounded evil!! She tried to school her terrified expression, though, because she didn't want her head of house or any of the cool teenagers to think she would let something like a radiator scare her.

Ooooh, but then that one boy actually had a real example! A weird example, to be honest, but it was an example all the same, and Fern felt a little jealous because here he was one-uping her in HER class. THE HUFFLEPUFF CLASS. Never mind that he was also a Hufflepuff, Fern was supposed to be the best in Muggle Studies, and therefore that was not okay. She glanced around, desperate to find her own example, but there was nothing to be found, and her hair got caught her mouth from all the whipping her head around looking -

Wait a minute.

That was it! Fern raised her hand excitedly, "Hair, professor! Muggles can keep themselves warm by having lots of hair! Like me!" She grabbed a chunk of her unruly brown hair, and gave it a little tug, to show Professor Hadley that she had a real example too, only it was attached to her head!