At this age, she isn't going to realize the importance of the holiday, so get something that is fun, not too expensive and put the rest towards savings or college, or buy a bond. She will really appreciate when she is 18 knowing there is money for her education instead of toys that are in a garage sale or attic.
You could also buy an experience such as a children's event, music and movement class etc. When you look back on this special time, think about what you will remember and cherish. Is it a toy or an experience? What was really special to you when you were really little?
I know this is a special time for you and your family, and you can make it special without spending a lot on things that won't mean much after a short time. I know many little ones prefer to play with the box that a toy came in instead of the box! Which incidentally, the box recently made it into the toy hall of fame.
Blessings on you and your family at this special time. We waited a long time for our daughter too. Take care and savor this time and experience.
Merry Christmas!
J.