It is rude to mess up areas.
Kelly has just finished cleaning in the living room when her son Jim walks into the room.
Jim wants to play with his toys.
Jim plays with his toys and then picks them up after himself.
Jim plays with his toys and leaves them on the floor that Kelly just cleaned.
Jim's toys stay in the toy box until the next time that he plays with them.
Kelly is annoyed and picks up and throws all Jim's toys in the trash.