I made these temari a few years ago. The balls look a little worse for wear because I let them be used in the traditional sense (basically, I let my kids play with them).
I was learning to make these following tutorials from the excellent, but now sadly defunct, Temari 101 website. The site was great. The first ball featured overlapped diamonds (the small blue one). It took me two tries to get it right. The black, red and white ball was my first try.
The next tutorials featured a whole bunch of spindle balls. I made one (the pink one), then I had my first baby. Temari require marking with lots and lots of pins. Pins and babies don't mix, so I stopped for a while.
The kids are bigger now, so I ready to try some more. The black one is another spindle ball.
The yellow one is my mis-guided attempt to follow these excellent instructions. I'll have to try again some other time. I seem to do better with my second attempts.
The ball at the back is the Rainbow design from the Temari Traditions book.
These two are my latest. They are both attempts of the Triads design from Temari Traditions. The design is a fully covered ball (meaning that the entire surface off the ball is covered with stitching thread). Getting the effect requires precise marking, something I'm still working at. The purple ball looks pretty good though, so I'm happy.