It didn't take long at all, 2 rectangles, a zip, some spotty material for the pockets and some bias tape is all there is to it.
I sewed the zip to the front and back with a double row of top stitching. I chose red thread deliberately to stand out and then did some of my most wobble stitching ever. The pocket is a double sided rectangle. As the stitching was going to show up on the outside I decided to go for red again and make a feature of it.
I may have to check out the new stationary store too, just in case there is something funky to put in it.