LO2 (2 months) cries something fierce in the car. I crank music and try to tune him out but it physically hurts me to listen to it. DH breaks out in a stress rash, covers his ears and vows to never ride with a baby again. Yet it seems to have no impact whatsoever on LO1 (2.5 years). She has not so much as made a comment about the screaming and often sleeps through it. I was wondering if it is typical or if she learned to tune babies out at daycare (I hope there isn't that much crying).

Do your kids react to their baby sibling's cries?