These shadow boxes are great and stylish wall storage units. Cut basswood board to the size of each box opening and paint them in a pinky peach and blue gray color. Push the basswood to the back of each box and it holds in, though if you want extra reinforcement you can add glue to the inside edges of the back of the box before pressing it in. For the third box, just leave it open without a backing. Now leave them to dry and then attach to the walls where you want. Now add your décor: vases, clocks or other pieces, and enjoy!