If you're looking for a project to spruce up your bed and make it more fun, grab some decorative fabric, purchase some plywood from your local home-supply retailer or lumber mill and set aside a couple of hours to create a fitting headboard for your spacious, queen-sized bed.
Measure the width of your bed frame. Queen-size mattresses are 60 inches (or 5 feet) wide, but frame sizes differ. Use this as a guideline to cut your plywood to the correct width. Cut the height as you desire.
Cut the foam to fit around the front of your headboard. Cut enough so that the foam can be attached to the back side of the headboard with adhesive. Lay down some adhesive along one side of the back of the headboard, then fold the fabric over and press firmly. Repeat this for all four sides, making sure to keep the foam taut so the headboard won't look bunched.
Cut the cotton wadding to fit over the foam padding. You'll need to use more cotton wadding than you did foam padding, as the wadding has more material to fit over. Lay down the adhesive and attach the cotton wadding the same way you attached the foam padding. Place the adhesive on top of the foam, and attach the cotton wadding straight to the padding.
Cover the headboard with your fabric. Use fabric-safe adhesive to attach the fabric to the headboard. For even more hold, use a hammer and nails to attach the fabric; place the nails where they'll draw the least attention. Keep the fabric taut to avoid bunching.
Cut a two-by-four into two, 15-inch sections. Determine how far off the ground you want your headboard to sit. Put the headboard face down on a clean work table, and drill 2-inch screws to attach the legs to the back of the headboard, placing the legs so the headboard will stand at your desired height. Extra two-by-four going up the back of the headboard is not a bad thing, as it will add support. Leave 2 inches of space between the legs and the side of the headboard.
Line up the headboard so that the legs are flush with the bed frame. Use a drill and screws to secure the headboard to the bed frame.