I researched a bunch of analogies in the scriptures and in various conference talks and CES devotionals. I tried to find a blueprint for a model house, but couldn't find anything so I drafted one myself with a ruler and compass and started making the house from foam core board.
I got most of the drafting and cutting pieces done in one weekend, and finished that up and started assembling the house while listening to General Conference the next weekend.
The finished project came out pretty well in the end! I was pretty happy with it. I'd originally planned to put a fence around the house so that I could have the "Gate of Baptism" but I still had the Keystone, Capstone, Door of the temple, Four Cornerstones (including the Chief Cornerstone), a foundation, Windows of Revelation, and a few other elements in it. It was a really great learning experience for me-- for example, I had no idea what a capstone was before doing this project.
I was really impressed though by several of the other projects. The last day of class we all brought our projects in and it was so cool to see what some of my class mates had been working on! Somebody found a piece of sandstone and literally carved the sunstone (I really wish I'd gotten a picture of it). Others painted, wrote and arranged music, and did so many other great projects.
(Below, the one of the classic first vision painting is a mosaic made from pictures of temples!)