Illustration photo: kippa. Not made by me...
To make a kippa, basically all you need to do is crochet single columns round and round, changing colors if you wish, until you reach the desired size. For me, the problem was the curve - the kippa needs to lay nicely over the shape of the head, not being too flat or too curved. The first few I tried to make were bubble-shaped. Another looked like a flat rug. I had no choice but to undo, and try again and again.
It turned out that I'm fine as long as it's all about following a diagram-like crochet pattern, or making something following exact instructions, which state just how many rows and stitches must be made. But when it came to estimating the curve as I went along, and adding columns accordingly, I hopelessly failed!
Needless to say, my husband was starting to be disappointed. To keep my spirits up, at the same time I worked on other projects, which seemed much more difficult to him (like the little blanket you see in the picture above) - and yet they were coming along fine, while this, one little kippa, I couldn't finish. Failing again and again discouraged me, and I worked slowly.
Today, I'm gradually progressing to make something which my husband perhaps will be actually able to put on his head in public... and which will be recognized as a kippa. I hope that once I master the technique, I will be able to make a variety of cute kippot for my husband (and if we have boys someday, for them too); I certainly learned one important lesson: just because something looks plain, it doesn't mean it's easy to make!