Gordon Lordy - I had a similar flower loom a long time back. Remember 70's Flower Power? I think I made a cot cover for my little one [now 36!]
and various other things. Quite easy really, a good idea for cards, but i would suggest crochet or mercerised cotton as wool would be a bit droopy [not a good thing to have a wilted flower on the card!!!LOL]
Judy C