In my pre-kid days I got all Martha and made a Gingerbread House from scratch one Christmas. It was really fun, and I'd love to do it again sometime. You know, with the boys, when they are 20 or so.
This was considerably easier than that Martha house. All the pieces were pre-cut ready to assemble. I did the assembly when the boys were sleeping. After naps we dove right in.
Ours looks like this...
but as we were cleaning up Evan said, "Fun! Gin-Gee-Bread House!!!" and I challenge even Martha to say that that is not the point.