Create an image of a vanilla cake designed to serve 30 people, featuring a dinosaur theme. The cake should be playful yet elegant, with vibrant green and earthy tones. It includes a large dinosaur figure as a topper, surrounded by edible decorations like trees and volcanoes. The frosting should be smooth, with a mix of buttercream and fondant details, making the cake look detailed and lively, perfect for a children's party. The overall design should evoke a prehistoric, fun atmosphere, while still being visually appealing for all ages.