Sprang netting is an ancient textile craft that produces a stretchy network of warp threads, useful for bags, mittens, stockings, scarves and hair nets. The word "sprang" (rhymes with "song," not "sang") comes from old Norse, although similar netting techniques arose independently of viking culture in many parts of the world far from Scandinavia.
This webpage shows how to make a simple sampler of sprang netting, derived from instructions found at Regia Anglorum's website.
Sprang netting is constructed on a set of two parallel beams: a "near" beam just in front of the weaver, and a "far" beam. Pencil-thin dowels serve well as beams for a small sprang project, though a large one might need thicker dowels.
Both beams are attached by cords to a rigid frame. The cords fastening the near beam need to be adjustable so the tension can be loosened as the twining nears completion.
You will need ten knitting needles (size 4 to 6), plus a crochet hook or another knitting needle.
A small project can use 30 to 40 feet of yarn or cord. Prepare for warping by winding this yarn on a shuttle. (A medium-weight yarn is best to begin with. Move on to lighter weight fibers after you master the technique.)