I added the little shelves or dividers inside. It was very simple: first I bought a strip of lath at Home Depot, then marked where to make the cuts, and then I asked (and asked!) the guys to cut it for me. That finally happened on Labor Day. I nailed it together, then spray painted it all black to match the frame. Underneath the dividers I added a piece of 12″ square scrapbook paper with a script design. The divider piece went in next, then I added all the mementos. Some of them are held in place with blobs of yellow sticky tack.
Here is a list of what I included in my shadowbox, all items I bought in France (beginning in upper left corner): reproduction tin sign, tiny china doll, souvenir pin from Versailles, glass dip pen, miniature metal Eiffel towers, china dish by Limoges, round wood cheese box (we ate the cheese), a souvenir print of Notre Dame, and a third Eiffel tower.
This was very fun to plan and put together; now I’m inspired to make another one using mementos from my childhood.