1Set aside 3 strawberries. Remove stems from remaining 9 strawberries; cut each into 4 slices.
2Into each of 3 parfait glasses or clear drinking glasses, spoon 1 tablespoon yogurt. Place 6 strawberry slices and 2 apple chunks over yogurt in each glass. Sprinkle each with 1/4 cup cereal. Spoon about 1/3 cup yogurt over cereal.
3Repeat layers with remaining sliced strawberries, apple chunks, cereal and yogurt. Garnish each sundae with reserved whole strawberry. Serve immediately.