Muggleborns at Hogwarts. < I really hate the assumption that muggleborns would be all. Like there would never be a jock or hipster muggleborn like real life who would be above this childish stuff. Fun ideas, but really ridiculous theories.
Um, they don't have light bulbs. So it would take 3 Ravenclaws. One to explain what a light bulb is after a ravenclaw took the light bulb and wiring apart and the last one to put the wires and light swich back together.