Using popsicle sticks cut at random lengths. Sanded with mouse sander, used 120 then 220 grit. Mixture of 50/50 white paint /water brushed on then wiped off. Five coats of water based poly, sanded between each coat.
It is perfectly imperfect, some spaces, which I can certainly live with. I loved the floor so much I had to repaint the left room from dark to a medium purple.
I will have to make a new top step on staircase as step and the raised height of sticks do not line up. Hopefully soon be able to glue the roof on as my cats are getting used to the open roof concept and are always racing each other to get the top spot in the house. Much more sanding to do before then as well as windows in dormers.