PREPARE cake batter and bake as directed on package for 24 cupcakes. Cool in pans 15 min. Remove from pans to wire racks; cool completely.
REMOVE 1-1/4 cups Cool Whip; set aside. Tint remaining Cool Whip blue with food colouring. Spread top of each cupcake with some of each colour Cool Whip to resemble the ocean and its beach. Sprinkle 1 tsp. graham crumbs over white Cool Whip on each cupcake for sand.
INSERT 1 small cocktail umbrella into beach area on each cupcake for the beach umbrella. Decorate cupcakes with remaining ingredients as shown in photo. Keep refrigerated.