In every bigger city, there is a zoological garden, where animals are on display for the public. A zoo is an architecutral space that widely reflects the relationship we have to the animal world - the more we estimate the rights and needs of the animals, the more we want them to live in ambients replicating their natural habitats rather than in small cages. We understand that boredom is a major problem of living in captivity. Much has to be undertaken to offer new challenges and diversions to the zoo inhabitants. Our project aims to build electronic sound installations to be used by the animals themselves. Using a wide range of sensors and tools, the animals become able to explore and to play with sounds and sonic moods. The animals, not the humans, will be in full control of the outcome of this sonic sculpture. It is our intention to build the tools in a close collaboration with scientists and zookeepers. Animals do not use music in the way humans do. Human music means nothing to them. But maybe, they find meanings and use in sound, which we have not yet discovered, and what we can enjoy once we let them take control themselves.