I always buy the mother or older siblings ( if toddlers or still young ) a present instead . A big brother or sister present to help them not feel left out or the mother something nice , I find that the unborn baby will have more than enough from other .
Diapers (they will need it)
Agreed nappies and spit clothes , never have too many .
IOU for ____ hours babysitting
A baby store gift voucher.