Last summer Susan Campfield showed us how to make this Triangle Trifold Twist card and I just made one. I colored the inside bird using the Balmy Blue and Pumpkin Pie watercolor pencils and a blender pen. I also sprayed it with my Frost White Shimmer Paint mixed with rubbing alcohol in a mister to try to match the specialty paper.
You need two pieces of cardstock that are 4″ x 10 1/4″, scored at 5 1/2″. On the smaller section, measure 4″ in and make a mark. Score from that mark to the corner. You do this on both pieces then you adhere the 5 1/2″ pieces together like below making sure the front triangles come together. I would recommend liquid glue to allow some wiggle room.