S.C.
I remember doing this same thing after my daughter was born because I loved my obgyn so much. I got a wicker basket filled with goodies for the whole staff. I went to Michael's dollar section and got a bunch of little items that any woman would consider useful: boxes of thank you cards, cute pens and pencils, little "to do" shopping lists with the magnets on back, and some other stuff I can't remember. That way, the basket was like a little grab-bag where each person at the office could choose a few things. Then, I topped it off with a card to the staff and, of course, a picture of our new baby.
I think it is so nice that you are taking the time to do something special for people who were kind to you. If only more people in this world were like that...