I have been making these little dolls for a while now and wanted to post a couple of pictures here so that you can see how I stuff them.
These dolls are just 6" tall when finished. The head and body can be stuffed by just using your fingers to stuff small bits and pieces of fiberfil into the bodies, but the are and legs are not easy to stuff.
I use a regular kitchen funnel and a wooden dowel to stuff them with. Just choose one that fits the opening fairly good, and hold the funnel inside the opening as you push a small piece of stuffing about the size of a quarter into the bottom of the funnel. If you don't hold them together the arm or leg will pop off the funnel before it goes in. Stuff it only halfway because you don't want your doll's arms to not stick out at a weird angle.