Wishing Tree after the wedding

Hey there!
The fiancé is really into the idea of doing a wishing tree instead of a guestbook. I think it’s a fun idea, but I’m a little at a loss with what to do with all these “leaves” after the wedding. I had originally wanted to create a guestbook alternative that could be displayed (e.,g, a personalized poster or something). If we do the wishing tree instead, the only thing I can think of doing is getting a poster made with a tree illustration and attaching the leaves to it.

If anyone has any creative ideas of what we can do with these leaves after the wedding is over, I’d love to hear them!
thanks!