Sushi cake

My son only likes ice cream cakes for his birthday but really wanted one done by me, so I bought a plain one, iced in white, and took it home to decorate like a sushi roll. The edges are wrapped with fruit roll ups. I made the color darker by using green gel color diluted with vodka and a small paintbrush (the alcohol evaporates). The "crab" is a sliced marshmallow wrapped with a red fruit roll up. The rest of the decorations are candy, and the "rice" are just white sprinkles.