Below is a tutorial I posted over the summer; however, during the gloomy-weather days of January, I thought you might enjoy being reminded of this tutorial.  Doll house building and imaginative doll house activities are wonderful occupations for dreary-day indoor play.
ORIGINAL POST DATED JULY 19, 2015: 
Over
 the past three years I've received many requests for tutorials (and 
book content) related to peg doll houses & accessories.  I love feedback and requests, however, I've hesitated to create 
tutorials (and book content) for a peg doll house because there are 
already so many good online tutorials. I posted a round-up of some of the nicest tutorials I've spotted on the web, however, in the course of doing research for that post, ideas started brewing in my head.
Up
 until now, if any of our peg dolls felt the need to cook a meal or take
 a nap, they marched off to a doll house which was handed down to our 
family 11 years ago; in case you want a peek, the doll house shows up in
 my first book as home to the Three Bears, and in my second book, it 
appears on page 74.  The peg dolls in my home also sometimes take up 
residence in castles made of wooden building blocks, so there really 
hasn't been a need to make a doll house.  
But
 after seeing so many doll house ideas online, the impulse to make my 
own was too irresistible. Today I'm posting a tutorial for the house, 
and soon will follow up with re-posts on 
creating the furniture.
SUPPLIES
-- A cardboard box: I started with an 8 in (20 cm)
    cube box, however you could stack smaller
    boxes or use a larger box if you prefer.
-- Extra pieces of cardboard
-- Decorative paper, fabric or paint and pens
-- PVA (white glue) and a glue-stick
-- Scissors, Exact-o knife (or box-cutter), a ruler,
    and pencil
STEP 1
 :: Cut the flaps off the box and turn it on it's side.  Cut back the 
roof section half the depth of the box (for example, my "roof" was 
originally 8 in (20 cm) so I cut it back 4 in (10 cm) -- see photo above
 for clarification.
If you'd like to cut windows in the
 sides, now is a good time (just be sure that they are low enough so 
that they are not obscured when you add the second floor).
STEP 2
 :: The sleeping loft/bedroom is 3/4 the original depth of the box, i.e.
 the original depth of my box is 8 in (20 cm) so the depth of the 
sleeping loft is 6 in (15 cm).
To create support for 
the sleeping loft, add 1 in (2.5 cm) around 3 sides of the floor. Score 
the cardboard along the added 1 inch sections and cut out the corners 
(see photo above). Use PVA glue on the three flaps to secure the 
sleeping loft in place (see photo below).
If your box is a different size from mine and you plan to add a second floor, you can adjust the measurements accordingly.
STEP 3 ::
 Once the sleeping loft is glued in place, set the house on it's side, 
use a ruler to draw lines from the top corners of the box down to the 
bottom corners, and then cut away the sides.  This will allow light into
 the house and also make it more accessible.
STEP 4
 :: To add a peaked rooftop, cut a long piece of cardboard the width of 
the roof, score & bend in the center, then glue it to the sides 
of the house (see photos above & below).
STEP 5
 :: After construction  of the house is complete, you may choose to 
cover the floors and walls with decorative paper, fabric or paint.  If 
using paper for covering the walls and floor, you will want to secure it
 in place with a glue-stick (PVA/white glue will cause your paper to 
ripple). You can also add a decorative carpet, and framed pictures to 
the walls.
Having a selection of decorative card stock 
on hand is wonderful when working on a project like this. Several years 
ago, I invested in a several books of paper-crafting card-stock: the 
designs I used for this project are no longer available, however I own 
this card-stock book, and thought 
this one and 
this one looked nice, too.
In
 addition to papering the floors and walls, I was tempted to add 
curtains to the windows and cardboard shingles or paint to the exterior;
 however, I ultimately decided to keep the decor of my house simple, 
flaunting it's origins as a recycled cardboard box.
How
 will you or your children decorate your little peg doll house?  Please 
email me photos (or post photos on my facebook page) if you're so 
inclined. And come back soon -- I will have blog posts on creating furniture for your peg doll house!