Insulation charms, yes. That would be awesome, and they could put them on specific rooms too, right? Toby could get Kace and the other boys from their dorm and they could really go to town at sealing in the warmth in their dormitory so they didn't keep waking up with pretty much frozen toes and everything.

Okay, so the spell. Toby flashed Fuller a 'don't worry be happy' kind of grin before noting down the spell, it's properties, the wand movement and the incantation.

"CAY... lum... SAY... pee... oh..." he said out loud as he copied the phonetics for the incantation down. "CAY-lum SAY-pee-oh." Toby set his quill down and continued practicing. "Caelum Saepio... Caelum Saepio." It was difficult to say at first, as it would be difficult for a lot of people trying out a new word. But he was getting there. "Caelum Saepio."