Andrew...what the heck, wait until you get to 17 years and see how well the ideas flow!
I gave my wife impregnation for her 2nd anniversary, how about that?
Seriouosly though, the 2nd year is an interesting time. You are really no longer "fresh" newlyweds and now should be preparing for "the rest" of your life. Assuming you have a vision of a family and family life in your head, now might just be the time to share that vision with her.
Maybe a journal in which you write a couple of chapters about what you think your kids will be like, how you hope they inherit certain qualities she has (the better ones).
Maybe include a picture of you when you were a kid, and one of her too if you have access.
Something like that.
(ducking...ready to be called a WUSS now).
TJR