From what I've heard, most people give, to new graduates, things that will help them establish their new life. Well, my friend is graduating this friday, but she already has a life. She is 19, married, living in a furnished house with a child. So what would you get someone who already has everything?

Wow!
Your friend is 19, married, has a child and finished school! That is wonderful. With such a busy life she probably doesn't get out much. You could give her a free babysitting certificate from you with a dinner certificate. It will be nice for her to spend some alone time with her husband to celebrate.