I have darned a sock
I used cotton embroidery thread, because it is cheap, colorful, and a natural material
I put a jar of jalapeños in the sock. I find it is easiest to darn things with whatever is nearby that you won't accidentally sew the sock to, and more convenient than finding a darning mushroom
. I sometimes wear a sock to darn it, but it makes my knee sore after a while.
(Editing this to add- the sock had two holes, and I only fixed one so far, i will get the second one soon)