honestly, I would make two. give her privitly the one with the twin that passed. It might be hard for her to have people around when you give it to her. And tell her that you wanted to leave it up to her which she would like to have. As some have said, I would want to have the reminder that my baby was here and not just a dream, which it might be how she feels. Plus when the living twin gets older it will be a reminder that their sib is with them always.and I like the dove idea also.