In case you were wondering, this is a niddy-noddy:
Not sure if you need one, right?
Well, you might, if you’re a knitter, or if you spin your own yarn, that kind of thing….
Here's a demonstration by folks at The Woolery
The Natick Historical Society in Natick, MA, has one in its museum.
An historian of my acquaintance mentions that the niddy-noddy was a conveniently simple tool for grandmas and granddaughters to use in yarn-stuff teamwork in 19th century America; it seems that the young and old ladies paired up often enough to do this work that “Niddy-Noddy” became a grandmother-ish nickname in some regions….
….and btw, a niddy-noddy is featured in an early 16th painting by Leonardo da Vinci, the “Madonna of the Yarnwinder,” see it here.