I like to do a "Pampers for Baby"/ "Pampers for Mommy" gift.
For welcoming a second or third child, diapers are a great gift. Diapers are consumable and you can never have too many of those- I get a package of diapers and wipes and then a storybook, teether and/ or special toy for the baby.
For mom I get a bubble bath or bath salts, a good book and a chocolate treat-
if you would like to give something for the family, do a movie night bucket- popcorn, movie candy and a DVD that the family will enjoy in a bucket or
offer to make a meal and dessert and bring it over- this will be a great help to the new mom and enjoyable for the rest ofthe family.
give the older kids movie tickets and offer to take them so that the older kids get a special treat and mom and dad can have some Q. time with the new baby (or rest time while the baby sleeps during the day)