Heat oven to 350°F. Grease and flour 1 1/2-quart ovenproof bowl, two 10-oz. custard cups and one 6-oz. custard cup. In large bowl, combine all cake ingredients; beat at low speed until moistened. Beat 2 minutes at medium speed. Pour 1/2 cup batter into each greased and floured 10-oz. custard cup and 1/3 cup batter into 6-oz. cup; pour remaining batter into greased and floured bowl. Place bowl in oven first, then custard cups.
Bake at 350°F. until toothpick inserted in center comes out clean. Bake cakes in custard cups for 20 to 25 minutes; bake cake in bowl for 50 to 55 minutes. Cool cakes in cups and bowl for 15 minutes. Remove cakes from cups and bowl; place on wire racks. Cool 30 minutes or until completely cooled.
Reserve 1/2 cup white frosting for water; reserve about 1 teaspoon white frosting for eyes. Place remaining frosting in medium bowl. Add enough yellow icing color for desired yellow color; blend well. Reserve 3 tablespoons yellow frosting for beak.
Trim tops of all cup cakes so that top is flat. Cut about 1 inch off flat side of bowl cake; reserve for later use. Place bowl cake, flat side down, on platter or foil-covered cardboard for body of duck. Cut 6-oz. cup cake in half crosswise to form 2 wing pieces. With toothpicks, attach wing pieces to side of rounded cake.
Spread small amount of yellow frosting on flat side of one 10-oz. cup cake; place second cup cake, flat side against frosting, to form head. With bamboo skewer, attach "head" to "body." From reserved 1-inch-thick piece, cut two 1-inch triangles for tail piece. Place small amount of yellow frosting on 1 triangle. Place triangles together; attach to "body."
Frost cake with yellow frosting. Spread 1/2 teaspoon white frosting on each side of head for eye; place blue candy in center. Outline "eye" with black decorating icing.
Add red icing color to reserved 3 tablespoons yellow frosting to make desired orange color; blend well. To make beak, use wedge-shaped jelly candies. Or, flatten large gumdrops and cut into two 1 1/2-inch triangles; insert toothpick into short side of each triangle. Frost candies or triangles with orange frosting. Position on cake for beak.
Add blue icing color to reserved 1/2 cup white frosting to make desired blue color; blend well. Frost platter around "duck" with blue frosting to resemble water. Remove toothpicks and skewer from cake before serving.