add wood wallpaper to the kick plates of the stairs. Those rolls are expensive but you would only need one. Not practical with white treads though, it will be stuffed up from black shoe soles in no time.
How to Make a Photo Display or Gallery in Stairway : Ideas and Inspiration!
It is a great idea if you have a stairway or long hallway. I have one whole wall of pictures of my family in my livingroom like this above the piano. Dream Home,For the Home,Home Sweet Home,There's No Place