I recently made a trip to the dollar store, and came home with a ball of cotton twine to play with. The first thing I tried was knitting i-cord with it, which worked fine, but I wanted something with more texture to hang on the wall. So I turned to crochet, and to the simplest crochet stitch: chain stitch. Then I started joining the chain at intervals to make loops:
The pattern is (after a few chain stitches to start off): chain 7, do a single crochet stitch into the first of the chain 7 to form a loop, repeat. End with a few more chain stitches, if you want. The chain 7 makes a nice rhythm to the work. Not all of the loops hang down nicely; some like to flip, and some I had to make flip to even things out. When it was finished, I hung it across a wall in our TV room.
The hook in the picture is made from a hardwood dowel, whittled to shape. It is currently the only crochet hook that I have, and is a bit on the large side. It was not hard to make; I have even made hooks from fallen sticks before. I recommend shaping the top of the "head" first, and cutting the "throat" last. I didn't put a finish on it; homemade hooks (and knitting needles) will gradually take on a pleasant polish as they are used.