Melt chocolate over a pan of water and, using wooden sticks pushed in to the egg-shaped cakes, dip into the chocolate to coat. If required, add sprinkles before the coating dries hard. Once cooled, they can be decorated with tube icing (which also acts as a 'glue' to add small edible items). You can even remove the sticks when the chocolate and icing has set.
Or... cover the 'eggs' with ready-roll icing and decorate.
