So here it is.
You get these cards (OK, no fancy stuff here - these are just heavy cardboard) and thread your warp threads through them from the top or from the bottom, in a sequence that creates a pattern (pattern instructions in some good books - references at end of post).
Using colors too (if you like - you could also go with black and white, or you could use all one color and just go for texture - so many choices!)
Well, color it is (that's just how I am!). After threading the cards, you tie one end, slide the cards to the other end to straighten out the warp threads (not a trivial task, let me tell you - no matter how organized you are to start out, it becomes quite a jungle of twisted threads), tie the other end, and hook them up somewhere.
This bundle is stretched from a cabinet knob to a clamp on a weighted tray table.
To weave, you pass the weft shuttle through the shed (that V shaped space next to the cards)
Then you turn the cards (either towards yourself or away from yourself, depending on the pattern),
slide the cards towards the weaving fell (edge) to "clear the shed" (straighten out all the newly tangled warp threads) and to press the weft thread firmly in place,
and when you slide the cards back, "Voila", you have a new shed ready for your weft shuttle!
And the pattern grows (sometimes in unexpected ways when you forget whether you're supposed to be turning towards or away from, but it's all kind of cool, and it's fun to be surprised, mostly).
This is a pretty thick 2-ply cotton thread to make a sturdy band (for my sample, test, discovery, learning experience). My next band will use a bit finer cotton to make a more delicate pattern (thinking about a ram's horn pattern), but still strong so that I can use it for a banjo strap.
Pretty easy, kind of fun, and cool patterns.
Good books to use (these are Amazon links, but I found these first at my public library. . . then I bought them):
Card Weaving by Candace Crockett -for good beginner instruction and basic technique and some nice patterns (she also has a video to teach the process)
and for the serious student and for in-depth info on history, instruction, techniques with variations, and tons of patterns - The Techniques of Tablet Weaving by Peter Collingwood