Spoon 2 tablespoons peanut butter onto center of each of 4 individual plates. Shape peanut butter on each plate into a mound about 2 inches long and 1 inch wide. Place 1 carrot down center of each mound of peanut butter.
Cut apple into quarters; remove core. Cut each quarter into 7 thin slices; cut 1 slice in half crosswise. Fan 3 apple slices on each side near top of each carrot to form upper wings. Place 1 half-slice on each side near bottom of each carrot to form lower wings.
Place 2 strips of celery at top of each carrot to form antennae. Sprinkle apple slices with decorator sugar.