Recently I piped a Monster High "Skullette" out of royal icing. I kept thinking how much it reminded me of a Hello Kitty head! Sure enough, the process is pretty similar. All you'll need is stiff consistency white royal icing, round tip #12, pre-made royal icing bows piped with a #57 tip, a flower nail, a Styrofoam block to rest the nail in, a glue stick, parchment paper squares, a dusting pouch filled with a 50/50 blend of cornstarch and powdered sugar, and food-safe markers like Gourmet Writers by AmeriColor. Start by sticking a parchment square to the flower nail with a dab from the glue stick.
When the icing is completely firm, draw in the face with food-safe markers. These would be ideal as cupcake toppers!