Well, I'm not sure if this comes under the heading of fancy folds but I'll enter it into the Bah Humbug challenge this week and see what happens!!!
This is basically a slider card and I have taken red cardstock and made an open ended envelope with it, decorated the front with a Clarity Stamp sentiment mounted onto nesties. I have watermarked the background using a Stampin Up set of snowflakes and punched gold mirri with a Martha Stewart snowflake punch. I then made up a card to fit inside the slider and used the SU snowflakes to watermark the card and gold embossed a snowflake onto nesties. A red polka dot ribbon was tied around the card and gold mirri punched snowflakes with gems added. To make the slider work you insert more ribbon into the centre of the envelope and slide in your card to the bottom. Then tie the ribbon in a bow at the side and to open you just pull the ribbon and the card slides out.
Thanks for looking.