If you have a stair wall to decorate, then it is obvious that your abode has a stair, which means that you are moving up in life (pun intended). Having a stair and thereby a stair wall adjacent to the stairs is definitely an uplifting thought (there is that pun again). Jokes apart, the stair wall decoration is a joy to do given the location of the area you are decorating on. You can always decorate this area with photos of the family but if you want to be adventurous, then go with useful and creative DIY ideas to try and make things interesting.