Hazelnuts glued together (using a lit to get an even circle) The result is a christmastree-ornament in the form of a wreath! ~I~ You could use chestnuts - and instead of glue - use needle and sisal-string.
My advent calendar consists of 24 little houses made out of paper. They can be easily folded flat for storage. Could be an easy way to create an elaborate Christmas village that is easy to store but looks fantastic and festive.