Hi! Any advice on this subject would be greatly appreciated. I wanted to build a cave for my Christmas Nativity scene. I would like for the cave to be a little bigger than normal. I want the cave to be about three feet wide and two feet high and proportionally deep. I also need the cave to be attatched to some sort of base (perhaps cardboard?). I don't know how or where to start. Should I use chicken wire? I've never worked with paper mache but there's always a first time for everything. Thanks.