I did make photos of one of my 'rope making machines' today.
It is rather simple, home made with simple tools, but it works.
(There should be a plank under the single hook block, I still have to add it, now you have to hold it manually.)
The counterweight on the moving part is a plastic 2 liter milk jug, with a handle, that can have any weight from a few gramms to 2 kilo's when using water, today I used about half a liter, so it was about 500 gramms, (near one pound).
Instead of a top I used a branched stick, it is in one of the photos. Worked better for the children, they understood it and could handle it well.
It is a willow branch that I cut some years back, I have used it several times and it still works perfect.
Willeke