Hello M.,
I highly recommend Portrait Innovations. They are very very good and have a great package price for $9.95 that you can get every three months. But it includes a ton of pictures and you choose the pose you want. Then you can also buy additional poses for an additional cost. Even the additional poses are a good price. They have super cute backgrounds and are good with the kids. They have a website if you want to check them out. And the best thing is you get your pictures that very same day. I've had really good luck with them.
www.portraitinnovations.com
I've also used Target and they turn out really good as well but I feel like I get more for the money at Portrait Innovations.
Good Luck & Happy Holidays,
L.