Wind yarn around a standard-size book until it has some heft to it. Slide it off, tie in the middle, and snip the ends open, then trim and fluff. Attach with extra yarn, and be sure to play with scale.
How to make tiny pom poms with a fork. Wrap yarn around fork until fat, then cut. Take a small piece of yarn and tie entire bunch together so that the knot fits through the prongs of the fork. Take off of fork and cut all the loops.