Have you ever heard of it?
Basically, you get specific felting needles and this felting wool known as roving. What you do is you take the felting needle and you keep puncturing the ball of roving until it becomes more firm and you can mould it into whichever shapes you want. You can make really cute animal figurines and such. I made sushi out of it once for a school project and got 97% or something. And it's really fun to do.