There are no fancy stitches, and you don't even have to knot the threads. You just push the special needle through the fabric, and it creates a hooked effect on the other side! I'm working on the Antique Rug kit for Phoebe's room. I changed the colors around to look a bit better in the room without trying to match the wallpaper exactly.
Here is the carpet after about a week of intermittent work. I started off packing the stitches far too tightly, so the design is a bit distorted in places, but I'm not worrying about that too much.

Here's the back side of the fabric. You can see the design a bit more clearly from this side. When I decided to change the colors around, I copied the printed fabric a few times, and colored the copies with colored pencils to get a sense of how I wanted the colors to work.


I could only fit four rooms inside, and I decided to make it open backed, rather than front opening like my real house.

Here's the inside. I used bits of laser cut paper on the roof, but I'm still looking for something a bit more delicate looking.
Unfortunately, I don't have any other photos, as I sold this box on Ebay shortly after finishing it, and the better photos have since disapeared. Lots of little handmade details, including a canterbury full of sheet music (front right) and a blue and white firescreen (back left by the fireplace). The walls were covered with fine gold silk, and the carpet was fuzzy. The box was a butchered bespaq piece. The only things not made from scratch were the (heavily modified) roombox and the oval metal frame.