1. First, we are going to take our foam block and place it in between the shirt, where we want our wool heart to be. In our case, we are doing it on the pocket, but you can do it wherever you’d like. Position your cookie cutter where you want heart to be. Take the wool roving and spread it out inside the cookie cutter. Now comes the fun part! Take your felting needle and push it through the roving and keep poking. Repeat poking until roving is embedded into the sweater. If you have an area with bare spots, just take another piece of roving and place it in the bare spot. Then start your needling until the spot is filled.
2. Once you’re done, remove the cookie cutter. Clean up the edges if needed. Once it’s ready to go, press the area with a warm iron and lock it into place. Viola!