Add pudding mix. Beat with wire whisk 2 minutes. Gently stir in whipped topping.
Place about 1 Tbsp. of the crushed wafers and 2 to 3 banana slices in each of 10 dessert dishes; top with 1/4 cup of the pudding mixture. Repeat layers. Top with remaining wafers. Refrigerate at least 1 hour or until ready to serve.