Ponyville! This was the family project of the holiday season. I didn't have time to participate in it as much as I'd like, but it turned out well anyway.
After deciding that making all these swooping shapes and curvy lines out of ginger bread would be absurdly difficult, we decided to make rice krispie treat material en masse, then turn it into whatever shapes we needed. This turned out to be problematic for the trees, but worked great for everything else.
EDIT: Equestria Daily! It even got its own post! This is amazing!