Jacquie,
For gift ideas, maybe a photo album, or a locket with photos of her mom & dad (or her new sister). Avon has some very cute but inexpensive jewelry for children.
Whatever you get her, maybe you should consider buying a duplicate for her sister as well. Although I'm sure they love each other dearly, it must be a little difficult for your son's biological daughter to live in a different State while another little girl is living in her Daddy's house.
I'm sure everything will work out great... just as long as everybody remembers to make both girls feel equally important to the family.
Congratulations on your new granddaughter, and best wishes to you all!
~ Sharon
