Armed with matching thread, I began the "sewing" part of the diaper bag project last night.
One of the things I enjoy about sewing is that there are many "aha!" moments, especially with a project like this. You start with a square of fabric and fold it here, then gather it there, and finally sew it to that other piece and - voila! - it's a pocket! There is a moment of "OH! So that's how it goes!" that hasn't yet gotten old.