By using my son's small toy dinosaurs, I concentrated on the "land" around them to create this cake.
Prepare chocolate cake as directed in 13 x 9 pan. Prepare vanilla cake as directed in glass batter bowl. Cut down to desired size for volcano. I used about 1/2.
Frost entire chocolate cake with vanilla frosting and vanilla cake with chocolate frosting. Dye some vanilla frosting blue for water.
Assemble as shown.