As wonderful as it would be to create gingerbread houses with all of your students each year, it's sadly both cost and time (not to mention mess) prohibitive.
This fabulous site from Highlights website- Design Your Own Gingerbread House will allow each of your students to create their very own individual gingerbread house!
On this site students can choose from many different food, candy, icing and other items to decorate their house any way that they choose. All items can be rotated, re-sized, and flipped which makes each house unique. This is such a fun and creative site and would be fabulous as both a whole class activity and as an individual student activity.
The completed houses can even be printed so students can take them home once they are completed. These houses won't be quite as sweet as real ones, but they are a great classroom alternative!