Preheat your oven according to the package instructions for the Party Rainbow Chip Cake Mix. Prepare the cake batter as directed, then pour it into a greased cake pan. Bake until a toothpick comes out clean, then allow to cool.

While the cake cools, prepare the vanilla instant pudding by whisking together pudding mix and cold milk in two bowls until smooth, about 2 minutes. Add blue food coloring to one bowl and pink to the other.

Cut the cooled cake into 1-inch cubes. Begin assembling your trifle by layering cake cubes at the bottom, followed by blue pudding and a dollop of Cool Whip. Repeat until filled, finishing with a layer of Cool Whip.

Cover with plastic wrap and refrigerate for at least 4 hours or overnight to allow flavors to meld.

Before serving, create whimsical nests with the edible candy grass and place Easter egg candies into each nest.