On the eight day I sent out a Promethean flipchart to all the teachers in my school that featured a crackling fireplace. The idea was to play it on the board while reading some favorite holiday picture books.
I can't find the original flipchart on Promthean Planet to share but low and behold YouTube has a TON of crackling fireplaces you can download and use. Here is one - http://www.youtube.com/watch?v=fsD1zoI7NYo
All you have to do is use a YouTube downloader and save to your videos and play while reading!