In our city, they broadcast a fire place scene on TV all during the Holidays. It even has a flanneled arm reach out and poke the logs so they burn better. We don't have a fireplace but we do have one of those huge deep old T'V's which takes up so much room.
So I made a faux fireplace surround for our TV out of cardboard. I printed out a pattern of natural stone and granite and Mod Podged it onto the boxes. We had been given a slab of wood which I used for the mantle, but you could make that out of cardboard as well.
Here are some home made Origami ornaments we folded up. My daughter is 10 and really enjoyed this. It's much easier than you think and once you master it, you can really churn them out. Click here for the folding pattern, it is called Good Luck Box from Richard Alexander. You can make some modifications to this pattern as we did to get different looks.
Have a Merry Christmas!