~ Build Your Own Shadow Box ~ a) cut a piece of quarter inch plywood to the exact size of your frame. Then b) cut four pieces of 1&quot;x2&quot; wood to go around the edges. Glue them down then c) hammer little nails in through the back to make it extra strong. Then cut four strips of 1/4&quot;x2&quot; and glue them down in the box evenly spaced out (d). They should fit snugly. Then cut 21 little bits of 1/4&quot;x2&quot;. They&#x27;re all exactly the same size (e). Glue them into the box, too. You might want to think ahead