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.
You will need: a jar and glow-in-the-dark paint! First, take one of the jars and rinse it out. Next, take a paint brush and decorate the inside of the jar with polka dots of glow paint. Finally, go into a dark space and watch your jar glow!