Needle felting -- either you know what it is or you look at the result and think "Oh ... stuffed animal" ... but have no clue how it came to be. A stuffed animal it is not. It makes (seemingly) no sense that taking a pile of raw wool (or roving) - this fluff that looks like cotton candy - and then poking it thousands upon thousands of times (and thousands and thousands more times) until it gets pushed and formed into a semi-solid shape... would become a rabbit or a lamb ... or any number of things.
The very thing that makes wool feel itchy to some of us - little micro 'barbs' (scales) on the fibers - are what makes this all possible. The poky needles used in the process also have barbs -- and poking the wool causes it to mat (entangle) together. As the driver of the needle it helps to have a vision in mind as to where the needle is poking and why -- what the desired shape will be, etc... I "see" what I want in 3D (in my mind) so it comes naturally for me to turn cotton candy fluff into an animal. I don't find it that different from putting paint where I want it to go when I am working with acrylic on canvas or wood.
Here I am attaching the gangly-long legs (which are bendable since there are pipe cleaners inside of them). The foam block shown here is my favorite kind. I have also used a grey utility foam - but it doesn't hold up as well the the abusive poking and pieces of foam can get tangled into the wool that have to be fished out - meh.
A reminder of where he came from - or as I like to say "pictured with his parents")