I want to make an easy, cheap king sized headboard.

king bed I want to make a headboard,easy & cheap

https://www.pinterest.com/explore/king-headboard/?lp=true

I like your challenge. May I humbly recommend a padded fabric headboard? Start in a home improvement store, where they sell insulation in sheets, cut to the right width for your beds. Then cover with batting (used for quilting, found at craft stores), and then a large piece of fabric that you like. I've used bed sheets, curtains, shower curtains, whatever you find that's nice and the right size. Attach fabric to the back of the foam board with duck tape! (No one will see it, it's on the wall side.) And use industrial strength Velcro to attach to your wall. Good luck!

Hang a pretty rug above your bed like a tapestry. The rug can be either old or new as long as it makes you happy when you enter the room. 😇

We have a king bed. I really don't like the bookcase style headboard we are currently using. We have decided to make a new headboard with a door. We will put it on it's side and put a store-bought mantle across it. Then paint it all one color.