Thermodynamics & Wizarding

[foxmoth at qnet.com]

No: HPFGUIDX 7270

I think it does have something to do with the power of the wizard. 
Dumbledore conjures enough sleeping bags for the entire student body in 
PoA. Could they have been stashed away somewhere? Possibly. (Tries to 
envision a chamber somewhere in Hogwarts crammed with purple sleeping 
bags. Maybe it's next to the one that holds Harry's non-existent fan 
mail.)
Pippin