My daughter just made her confirmation and I bought her the NAB Teen Bible. It is a bible w/ inserted sections written in a straightforward language for teens - like a question and answer sections (NAB Version). About $15.00.
When I was looking for gifts, it is so much easier to go to a "Catholic" religious store than a "Christian" religious store. They just don't have as much to offer in the way of Catholic items (NAB version bibles, specific Saint books, jewelry & pendants w/ Saints, etc...)
Also, my daughter's sponsor (her Uncle) bought her a book about her Saint's name. I was going to get her the sterling silver pendant necklace w/ her Saint's name on it but just didn't think she would wear it a lot.
Carmelite Gift shop - Darien, IL is a wonderful store....found a good variety of Saint Pendants for .50 - $2.00 each as well as other jewelry.
http://www.carmelitegifts.com/shop/default.asp
St. Anne's Gift Shop, in Orland Park was where I found a great variety of books, too.
One thing we did for my daughter (from her dad) is bought her a small wrist corsage w/ orchids in it and her Uncle and Aunt gave her a bouquet of a variety of white flowers - lilies, carnations, snapdragons, daisies and mums.... (from Costco) - really one of the most beautiful bouquets that I have ever seen and lasted almost two weeks! (Around $20.00) My daughter was one of a few people who received flowers (I was surprised by that) and it really made her feel very special!
Congratulations on being a sponsor.