Prepare cake batter and bake as directed on package for 24 cupcakes. Cool in pans 10 min.
Remove to wire racks; cool completely.
Meanwhile, beat pudding mix, sugar and milk in large bowl with whisk 2 min. spoon into pastry bag fitted with round tip. Refrigerate until ready to assemble cupcakes.
Use small sharp knife to cut cone-shaped piece from top of each cupcake. Fill cupcakes with pudding mixture, piping about 1 Tbsp. pudding mixture into each cupcake. Replace cupcake tops.
Spoon frosting into medium bowl.
Add COOL WHIP; whisk until blended.
Spread onto cupcakes. Decorate with remaining ingredients to resemble turkeys as shown in photo.