Oh, fond memories. Going back nearly 30 years I remember my 1st grade teacher taping rows of string at the corner of our desks. The students would weave different color yarn when there was downtime.
I tried to do the same thing--creating a make-shift loom and weaving embroidery floss. I predict that thicker yarn is probably better to use but the floss is all I had and I am satisfied with the results. ~ JM