Kids, running away to avoid cleaning your room won't work.
Something tells me those two will be spending a fair amount of time in their room well past it being cleaned.
Additional tip for kids- shoving everything into a cupboard, or beneath the bed won't work either unless your mother is really handicapped and can't bend over to check. My mother was pretty handicapped, but she'd just poke he cane around and be all like, "You didn't clean your room at all!" So yeah, you'll have to clean up. What's more, hiding your laundry behind a bookcase... really bad. Really, really, bad. If your mother has to physically pull out a bookcase to get at your shorts, she's gonna be furious.
So clean up your room.