You can roll the wool into a good size ball, just as you would to prepare it for knitting. Put it into the bottom of some trouser socks or an old pair of pantyhose, tie it into a slip knot (the hose or sock) so the ball is still in a ball shape at the bottom of the sock. Put it in with your wash a few times (it will take longer if you have a front loader), when the hairs are showing through the sock it's probably felted enough, if not you can just put it back in. Peel it out of the sock, if it's slightly misshapen you can wet it and shape it properly then let it dry for a few days or over a radiator heater or microwave. Then you can decorate it with beading, ribbons, ect. We're going to thread some thin ribbon through the top to make a hook. You could probably bead it before you felt it also. What I've been doing is making the inner part of the ball with acrylic yarn (my mom gave me a bunch and I don't know what to do with it), then I cover it with wool, seems to work just as well. Also, I've been spiraling contrasting color wool around the outside, after a few times through the wash, with a felting needle, then I wash it again a few more times. Basically, the possibilities are endless! You can also make balls for kids and/or cats as holiday gifts. I'll try to post pics of mine soon.