When our tester made her first Poo Pocket, in under an hour, she was amazed ... her exact quote was something like "That hardly took any time! I can't believe how much I've paid for diapers in the past, when I can make them this quickly!"
The original design doesn't have any fasteners; you can use the diaper like that with a snug-fitting diaper wrap, or use the enclosed directions to add hook-and-loop closure. Fits from 7-30 pounds. Absorbency is up to you; the diaper we made with Natural Sherpa on one side and Rich Natural Heavy Flannel on the other was much thicker than the one we made from Cactus Gingham Check Flannel, which was nicely trim.
These diapers can be made with a regular sewing machine or a serger; we did both, and the serger's definitely faster and "cleaner"-looking at the end, but both work well. You'll need 1/3 yard of 1/4" wide elastic, and each diaper takes a generous 1/2 yard of fabric. If you're making the diaper out of two different types of fabric you'll want a generous 1/2 yard of each. It's much more fabric-efficient to cut several diapers at once, carefully planning fabric usage; it's possible to get 6 diapers out of 2 2/3 yards of 58" wide fabric cut on a single layer, and 12 diapers from 5 1/3 yards of fabric folded with raw edges together. Just about any soft, absorbent fabric will work, including flannel, french terry, sherpa, terry toweling, knit terry, birdseye, and gauze.