It's actually two days and we do our best to reuse material year to year. That said its not the two days of use that drives most people it's more the experience and opportunity to build. Plus there's a competition among organizations. We did not win with the booth I posted (got second) but we did win the following year. I might have posted before but I don't know for sure. I use this site the same way I have conversations and trust me I tend to retell stories every once in awhile.
A good story is worth repeating. Sounds like a cool experience. What was the booth you built that took the #1 spot?
The theme was epic adventures. We did journey to the center of the earth. Here's me again at the top of the entrance. And here is a view of the front. (Saving an image from Flickr on my iPhone proved incredibly hard so you'll have to click for this one).