I'm making a temari ball right now. It's a traditional Asian craft, apparently women would start making them before the new year and then give them to their daughters so the first thing they would see when they opened their eyes on New Year's day was a beautiful embroidered ball.
This website describes them as a "Japanese symbol of perfection"...I don't know if mine is that, exactly. It's my first time making one so I'm learning as I go, but the secret seems to be about 1/2 hand-eye coordination and 1/2 obsessive attention to detail. Oh plus a lot of math, too. The math is what screwed me up a little, which is why it's no symbol of perfection. Plus I'm regretting my choice of background thread color...
Anyway I am sure I will make more of these, if only because I hate not getting something exactly right the first time. Plus it's very intricate yet I can do it while watching movies, which I love. If you're interested, it's a styrofoam ball, covered with a layer of batting, then a layer of yarn, then a layer of thread wrapped randomly around the ball. Then you divide it into sections and embroider a pattern.
It might be a craft in the next book I'm working on, but only if I can figure out how to write the directions for making one!