Enlist your older child as a helper. Encourage him to help with baths, dry the baby, get a clean diaper, or find toys or a pacifier. At other times encourage him to feed or bathe a doll when you are feeding or bathing the baby. Emphasize how much the baby likes the older sibling. Don't ask the older siblings to be quiet for the baby.
Newborns can sleep fine without the house being perfectly quiet.
This request can lead to unnecessary resentment. Accept regressive behavior, such as thumbsucking or clinging, as something your child needs to do temporarily. Do not criticize him. When your child behaves aggressively, intervene promptly. Don't spank your child or slap his hand at these times.