Fourteener Helps You Learn Knots
The "Fourteener Knotting Tool" is a simple little piece of hardware designed as an aid to learn knot tying, offering 14 different simulated pieces of hardware. It even comes with a nylon strap that can be used to secure the Fourteener to something—your leg, for instance—to give it proper resistance.
Sure, you could learn all these knots without a special tool, but I think it's a pretty neat little gewgaw for fifteen bucks. And the inventor, Darryl Lusk, also throws in a length of cord and a booklet of knots to get you started.
Product Page [14erKnottingTool.com via Toolmonger]

the latest
latest episodes

Or one could spend 99 cents on a plastic cleat and work up a much uglier but definitely functional apparatus from scrap, which is what I did when teaching my kids knots a few years ago. The portability of the commercial model is a potentially useful feature, although immediately after writing that I had that thought that practising knots on the subway or bus during your commute may be considered suspicious by some.