Mix the cake mixes according to package directions. Pour four cups of batter into a 1-1/2 quart ovenproof bowl (figure J). Pour three cups into a one-quart ovenproof bowl and divide the remaining batter among three 8-inch round pans. Bake the bowl cakes for about 45 minutes to one hour. The pan cakes should take about 30 minutes. Allow the cakes to cool for about 20 minutes before removing from the bowls and pans. They should be completely cool before assembling the cake.
Trim the cakes so that the surfaces that go together are flat and even. Place the large bowl cake on the bottom and trim the large end. Spread with a thin layer of frosting and top with one of the pan cakes. Frost lightly, add a second layer then repeat and add the final flat cake.
Top with the small bowl cake with its trimmed side facing down to create an egg-shaped stack of cakes. Insert two skewers on opposite sides and place the third skewer through the center. Trim the pile of cakes with a serrated knife to create as smooth of an egg shape as possible. Trim about a one-inch slice vertically from one side of the cake. Transfer the cake to a piece of heavy cardboard that is wrapped in aluminum foil with the trimmed side down so that the cake now looks like a large egg sitting on its side.
Spread frosting on the cake, then refrigerate for a half an hour to allow the frosting to set. Use the yellow food coloring if desired to add color to vanilla frosting. Spread another layer of frosting on the cake, then sprinkle with the yellow sugar crystals. Score lines on the cake with dental floss and arrange jellybeans and silver dragees in rows as decorations. Toss the coconut in green food coloring and sprinkle it around the cake.
* Dragees [dra-ZHAY]--Tiny, round, hard candies used for decorating cakes, cookies and other baked goods. Dragees come in a variety of sizes (from pinhead to 1/4-inch) and colors, including silver; almonds with a hard sugar coating.