Here is a doll house that I built years ago, when my daughter was small. She is 26 now.
It was a kit that had to be assembled. The wood was unfinished and each individual piece had to be painted, then glued.
First the walls went up, then the roof. Windows were installed and then each piece of trim had to be painted. The shingled roof had about 500 pieces, that were glued individually.
It took a few months to complete, but I enjoyed watching it take shape.