All boy scouts and girl scouts do that when they're left alone during camps! They go into sleeping bags just the way Slytherin does here and hold caterpillar/worm/snail/snake fights. Usually, one animal name refers to the version where the hood is over your head but your face isn't covered because it's a hood. Another animal name refers to the same game, but with the sleeping bag upside down so you don't see a thing.
15 F
You forgot Ravenclaw!