The second, the grey house, is made of individual walls and floor that are covered foam core and a plastic canvas roof. The second and third house walls and base were constructed using foam core, which gave both more stability, and allowed the fabrics to lay smoother on the construction material, as you can see from the photo's below.
The last, the beige house, is made of the same covered foam core, but not individual walls. Each has points in it's favor, and things that might be better. Here's the path I took.
I saw something somewhere that gave me the idea of creating these Christmas gifts. In my mind, plastic canvas seemed the perfect medium. Each sheet is 10.5x13, which I cut in half to make 10.5x6.5 sheets. Now, with a wall size, we can begin.
First, the exterior and interior wall and carpet fabrics must be chosen, and any embellishments to those walls added before you can begin construction (flowers, windows, doors...)
Once those are added to what will be the inside and outside, it's on to construction. For the first two houses I made, each wall is constructed individually, other than the base and 4th side, which are constructed together.
This meant that there was a lot of hand stitching, especially to the first house. by the time I devised the plan for the third house, hand stitching was only needed for the roofing. Each wall fabric was cut out at 11x7", the end two stood on end, and the foam core evenly cut from 6.5 to 10.5 into a triangle to make the top of the wall and the place that the roof would rest. The fabric was not cut, but left square, and sewed to the roof support (plastic canvas) to give extra support to the roof. I made a handle for the first, the second two I used button holes and cord or shoe strings to create a handing carrying handle to each of the houses.