The Saturday Workout challenge is called Fold It. I've used a design from Quietfire Designers, and you can find the instructions here. They were easy to follow, and quick to make.
The central panels within the flaps are stuck on to the inside of the card, thus creating a window.
Stamps : Darkroom Door Chorus
Inks : VersaMagic Hint of Pesto; Adirondack Dabbers Lemonade and Purple Twilight
Extras : Yellow Brads; BB Purple card; PP by K&Co