Cut a slice off a styrofoam ball, as in the picture. Adjust to fit inside plastic 2-part round ornament, glue into place. Use styrofoam glue to attach a miniature nativity set to the styrofoam 'ground'. At the back of the scene, poke in a few small sprigs of greenery or white 'floral' stems. Make sure front of ornament can snap on correctly. Glue halves together with small amount of tacky glue. Glue angel to the top.