Welcome to the best small breed message board on the net! You will find YT a wonderful resource.
You might not be able to get a pup for Christmas and that isn't a bad thing. A pup is a LOT of work and Christmas brings it's own stress. Depending on your area finding a good breeder with the right pup can take a while. Maybe get some dog things and wrap them up and tell your daughter they will be for her new friend
. She might enjoy helping you look too.
I would advise you look for a pup that will be on the larger side when grown. Folks here call them Teapot Yorkies
Also, temperament does have a genetic factor so you are looking for calm parents. A GOOD breeder will work with you on this. You will find the people here very knowledgeable and helpful. They are also a good resource for checking on breeders if you feel comfortable giving out your general location and how far you would be willing to travel.