Place the headboard on top of the foam core board. Cut out the outline of the headboard in the foam core board with a craft knife.
Place the headboard on top of the fusible fleece, and trace its outline with a marker. Cut out the shape, and repeat two more times.
Stack the fusible fleece pieces on top of the foam core board. Cut a pressing cloth to the size of the headboard, and lay it over the fleece layers.
Mist the surface of the cloth with water, and run an iron over it to fuse the cloth to the fleece.
Lay the headboard down on the fabric. Cut the outline of the headboard in the fabric away from the edges enough to allow the fabric to stretch over the edges and onto the back.
Start at the center, and run the iron toward the edges to secure the layered foam core board to the headboard with the fabric.
Align fusible adhesive along the edges of the headboard paper side up, and iron them. Remove the paper, and run the iron over it again.
Cut a piece of fabric 1/2 inch smaller than the headboard, and fuse it to the back.