One cage has a base of compacted earth, the other bases are made of sand, carpet, water, cement and roll-on roofing. The cases have large canvas backdrops painted with fish food, rat poison, cuttle fish ink, engine oil, leaves and concrete/tempera. They are the setting for the presentation of the imaginative and funny looking sculptural instruments created by Gareth Moore. The instruments imitate a broad variety of sounds, created by people, nature or objects.