Get a piece of drawing paper, a large one. about 17x11. Fold it
Cut the solid lines and fold the dashed lines. The top side will become a roof and the bottom part will become a wall. Color and decorate both sides as needed.
If this is for younger kids, you can help create the template. If this is for older kids, they can create their own house.
After you cut the blue shaded lines, you can attach both sides together and it will look like this.