Do all you miserable old crones know how to do i-cord knitting? The result is similar to the tubes you got from the knitting Nancy, and they are handy for trims and ties.
Basically, you cast on a few stitches (5 is usual, but you can do more or fewer depending on how thick you want the cord) onto a double pointed needle. Knit as usual, then push the stitches to the other end of the needle, and bring the live yarn from the end of the row to the beginning of the next - you sort of wrap it round the stitches and pull it tight, then knit that row. Repeat until you've got the right length and cast off.
You can knit i-cords directly onto garments or blankets - google i-cord cast-off/bind-off to see how - it's also easy to do, but more complicated to explain in words instead of photos or video.