Apparently children get election day off from school. Because, you know, they need the whole day to vote. (I understand that a lot of schools are used as polling stations and you don't really want to have sinister citizens--the kind who vote--hanging around schools where children are attempting to learn.)
At any rate, the teens didn't show up at the library today.
I was able to have a dry run with the librarian. I chose perforated paper because it's easier to hold, and that worked the way I planned, but the pattern makes it difficult to secure the threads (a lot of vertical lines). I think a waste knot might be a good approach. I also might mark a place for them to start, because even when I said half an inch in, I still had to show where.
With extra time, I'll be able to finish both patterns so the students will be able to see their choices.
We had scheduled a second session for finishing, but we're going to use that as our first session. Expect to hear (and see) more in two weeks.