[Darner]

In needle felting you start with a wad of fibers, usually wool but there are plenty of synthetics if you want that. They sell dyed wool in a wide variety of colors so you can blend them together to make any color you need. Then you use a felting needle to repeatedly stab through the fibers. The needle has barbs which pushes the fibers through the other fibers and you keep stabbing until they are weaved together. With enough work you get a solid form. A lot of people needle felt sculptures like animals, dolls, pretty much anything. I learned about needle felting from my wife who teaches art to kids.

To patch a pennant, you can weave into an existing piece of felt pushing the new fibers into the old. Do it enough, you’ll build up a new piece of wool felt. It’ll be fuzzier than the original but you can use an iron to get it flat to match the original felt. To finish, trim to match the edge of the pennant.