Since this thread is back on the first page -- I'll share that I've experimented with some variations on the pea pod bag. I've made them with 12 and 15 inch squares, which makes for a nice size to hold a collection of toys such as matchbox cars or shopkins. I've used zipper by the yard which I purchased on Amazon -- it's larger teeth, wider tape than standard garment zippers- - probably intended for light upholstery projects, but very inexpensive and easy to work with for the larger pea pods. You get 30 - 40 pulls with the however many yards it was; those pulls are not interchangeable with any of the YKK or Atkinson packs, so you're pretty much stuck using the matched color, but they are very cheap and hold up well to small kids' use.