There are TONS of different ways to make a gingerbread house! Here are 3 easy ways that I have used.
About 3 years ago, my oldest nephew, R, who was 5 at the time asked if I would help him to make a "holiday house." I had never made one before, but I would (and still will) do anything for him so I said sure. We bought a bunch of candies, some flat shortbread cookies, and vanilla frosting. My neice, K, who was 2 at the time came along too. It was a lot of fun...basically they spread the frosting onto a piece of cardboard covered with aluminum foil, and decorated with with the cookies and candy. I just let them go crazy with it. I took pictures of them and my favorite one is them standing in front of their house looking super proud of what they made.
This year I did it the "lazy" way, and I went to the store and bought a gingerbread village kit, where you can make 5 mini houses. I have my sisters 4 kids, and my kid, so it was perfect for us! It wasn't very expensive and it came with everything I needed, the mix for the frosting, the candies, and the gingerbread shapes ready to be put together. My nephew R was very creative and actually turned the pieces of his house into a gingerbread man! The babies, D and T, didn't really do much except eat their houses LOL.
Finally, D went to a gingerbread making workshop with a bunch of other kids, and how it was set up was that each kid got a small milk or cream carton, about 6 graham crackers, frosting which was made with icing sugar and water until the was thick and sticky, and a plate full of candies. The kids used the frosting to "glue" the crackers and candy on to the carton to make their houses. D wasn't too interested in building a house; he glued two crackers down, then ate the candy, then ran off to play LOL.