Look at this one I found, it's so beautifully used. I wonder how many children's hands held this knitting mill tight and learned to make a funny long thread?
In my class I teach children this old technique when I notice a little glow of interest in textile creativity. There's always one who can really stick to this work, take it home and come back the other day with a proud face and a long thread. I was just like that as child. And still am ;-)