I found some very economical lights on amazon.com. For 11 dollars you get six strings of lights and the batteries are included.

Here: LED Light Strings

You have a lot of options with lighting and you can get very creative. For example I folded up the end of a string to form a chandelier.

Use cellophane tape to tape the lights into place.

Then secure the lighting with white glue. Don't use hot glue gun on the lights. The hot glue can melt the wires.

One string of lights will work for both floors of the dollhouse.

And that's it. Your Dollhouse is complete. Have fun!

Here are the LED lights that I purchased from Amazon.com for this project:

LED Lights

This packet of LED's is a terrific bargain. I have used them for many projects. You get six strings of LED's with lots of lights on each string. And the strings are all 7 feet in length. And... it comes already loaded with the batteries and on/off switch. These are literally ready to go.

Want to see some of my other cardboard projects?

Make a Marble-tilt labyrinth game out of a cardboard box. A box and some creativity and you have a fun game. Make the labyrinth any way you like. I also have some clever labyrinth ideas for you. Make a Marble-tilt labyrinth game.

Make a strong Viking axe out of foamboard or cardboard

This is a fun and easy project. And you can handle it a lot because it is durable. I also show you a new technique for making the bevel on bladed weapons. How to Make a Viking Axe

How to Make a Cardboard Catapult

How about making a powerful little catapult out of a piece of cardboard, a pencil and a rubber band. Make a Cardboard Catapult