I have just compleated the 40139 Gingerbread House. I ordered a Ewok Villiage and Lego was nice to add the Gingerbread House along with it.
I added some extra christmas star wars mini figs and light to the inside of the house.
A close look at the house from the side. As you can see, there are some lights comign from the roof. There it is a singel piece. Rest of the roof has two pieces. As you can see on the next pitucre you see a small white snow building, it holds the battery for the LED lights. I used small LED lights that is attached to 3 AA batteries. I had to remove a 1×1 piece fromt he back of the house to got the lights into the house. I guess you can do it another way, this was the LED is buildt into the house, but if I do it again I would get the lights through the roof if posible.
I will probebly add the C-3PO and R2D2 from this years star wars advent calender, when I get them.