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In crochet, there's a Magic Loop, too. For amigurumi and other things worked in the round, where you start in a small loop and you can pull on the yarn end to close that to a very tiny hole.

Wow, I've never thought about this for crochet as crocheting needles are straight. Hahaha you know really a lot, @muscara. You are Needle Work Goddess!

Here's an example by the late Elizzza: