I was given a big box of leftover embroidery thread and I have been using it learning to make temari balls. They are made by wrapping yarn and then thinner and thinner thread around a core until it forms a ball, dividing the ball and marking it with thread and finally stitching geometric designs over the markings. I am still very much a beginner but these are really fun to make.
I would say the initial wrapping usually takes me an evening, so 2-3 hours. Then the marking may take 1-2 hours depending on the type. And the embroidery can vary a lot depending on the design. It can take 2 hours, it can take 10.
But the process is very satisfying. You can see your progress and the geometry of it all is really fun to observe and build upon.
This is incredible! I had never heard of these so I've been looking them up and they are super neat. Thank you for sharing! Definitely not looking like a beginner at all!