DIY wedding keepsake

I know you're probably sick of wedding-related posts, so this will be the last one for awhile, I promise. It all started with a plain-looking shadow box I bought for $2 at a yard sale ("it" being this project, not our wedding, although that sounds like an interesting story). The frame was missing its backing, so after I painted it, I made a new backing by wrapping a piece of cardboard with kraft paper. Then I used a little scotch tape to secure one of our wedding photos, an invitation, a pocket-sized program, and one of the fabric boutonnieres I bought on Etsy (which required pins). The plan is to hang it in our bedroom, whenever that's done...