I had a constant headache this week so I only worked at the staircases yesterday and today.
It was not perfect but since I'm going to add some carpet (rugs?) on it, I think it end up pretty good!
This is the first-to-second floor staircase:
This is the second-to-third floor staircase (built from scratch with popsicle sticks):
Now, I have to paint it, if I can decide which color, add the tapestry so it can be glued in place... After I decide the wallpaper...