You know what really grinds my gears? When I first had Addy everyone in our parents generation kept saying “you should vacuum while she sleeps so she gets used to the noise”. How disrespectful is that? How would you like it if you were sleeping and I vacuumed beside your head? Would you turn on a blender when your tired grandma was asleep on the couch? No! Stop trying to design your children. If they are going to be a light sleeper there is nothing you can do about it. Treat your children like people because that is what they are!