It's a pyramid or teepee card and you can find the instructions by doing a google search, it looks really complicated but it is really easy. I used a Halloween image from House Mouse Designs. The sentiment is from a stamp from Kraftin' Kimmie (still working on the first 21)
As you see it folds flat for mailing. I use a bit of velcro for the closure of the card.
I am entering this in:
House Mouse & Friends Monday challenge ~~ Anything goes or Fall Colours
Thanks for visiting today and have a great day!!!