How to felt roving

I’m looking for step-by-step instructions on how to felt roving. If anyone can help by sending a website or instructions, I would greatly appreciate it.

http://www.allfiberarts.com/library/felt/blfelt.htm
http://gfwsheep.com/feltballs/feltballs1.html


http://www.mielkesfarm.com/ladybug_dir.htm
http://www.threadbanger.com/post/11100/shocking-discoveries-about-needle-felting

Hope some of these are helpful.