This is the cake I made for my 2 kids' b-day party today. I have a 4yo DS and 5yo DD, so we chose something that was fun for boys & girls alike. The sides of the bottom cake represents the aquarium section of the zoo, the top is the arctic animals (fondant), next is the savanna group, and the top tier is the tropics. Everything is edible except the monkeys & bananas on the top tier- those are Imaginext toys from their jungle line.