In 4 individual parfait glasses sprinkle 1/4 cup crushed graham crackers. In a small mixing bowl stir together half of the vanilla yogurt and the vanilla pudding. Spoon into parfaits.
Sprinkle 1/4 cup more graham crackers over the parfaits. In the same mixing bowl, stir together remaining yogurt and chocolate fudge pudding. Spoon into parfaits. Sprinkle remaining cracker crumbs atop. Serve immediately or cover and refrigerate the parfaits until serving time.
To serve, top each parfait with dessert topping and a cookie or maraschino cherry. Makes 4 servings.