DIY headboard

My daughter's headboard was my first. I would use a French cleat to mount now.  I also used an old comforter in lieu of batting. It is visible at the bottom but not when behind the mattress.  I attached the legs and drilled for button holes.   Then I stapled two inch foama, then the comforter, and finally the upholstery- in this case a curtain.  Lastly I used button kits to make matching buttons.  I threaded them through with a long needle and used washers to secure. Voila!