Also, you may want to peruse the pictures section and some of the other posts to see what type of a habitat and care the turtle will require when it grows. A cheap-ish Christmas present can turn into hundreds for a large enough tank, filter, lighting etc. If you are considering the turtle because it seems to be cheaper and easier than puppies and kittens you may want to reconsider. I personally don't think that pets make great gifts as a lot of times, the present requires more care than the receiver really wants to give or that christmas puppy gains 70 lbs and starts drooling all over the place
However, if once you find out the requirements for a turtle you still want one, they do make wonderful additions to your animal family. I don't mean to sound negative about the gift idea but if you look around the site, you'll see a lot of posts from some frustrated people who bought a $10 turtle and now are spending several times that to set it up properly.