I taught my library group to make them. They are hot glued. No need for the binding if you don't want. I had some leftover cut binding so I used that. a diff fabric on each side!
tute for the board:
http://beeinmybonnetco.blogspot.com/...=project+board
tute for the binding:
http://beeinmybonnetco.blogspot.com/...ialpart-2.html