TIP: If you're adding eyebrows, faux fur has nap, meaning that if you look at the fabric, the fur points in a certain direction. Make sure you line up your pattern pieces such that when you cut your right eyebrow, the fur points to the right. Then flip over the pattern so that when you cut your left eyebrow, the fur points left. Warning: When you cut faux fur, be prepared for a flurry of scrap fur to cover your workspace. Try to only cut the fabric backing, not the fur itself. Still, arm yourself with a Swiffer or a vacuum cleaner. You'll need it.
Stitch in place. Push the fur aside so that you're only stitching the fabric backing.
The styrofoam cone was taller than I wanted my horn, so I left the bottom few inches of my fabric cone unfilled. I gathered the extra fabric and tied the threads to form the bottom of my horn.