Scooby loves hamburgers so instead of Scooby eating a cake, he is eating a hamburger for his birthday celebration. The birthday boy specifically asked for a rainbow colored cake with orange frosting (I know, smart kid, right! I KNOW!). So I made a Rainbow Bright cake (vanilla cake with sprinkles baked into the batter with a layer colored blue, yellow and green to match the design) and layered the cakes with orange buttercream. This cake ended up being 5-inches tall. The characters' faces were around the sides of the cake. All decorations are handmade out of marshmallow fondant.