I have a spare Ten Gallon tank that I would like to use to house some variety of exotic animal, most likely to just observe; not to interact with. The enclosure is 18 inches tall, 12 inches wide and 12 inches long. I realise that doesn't offer very many choices, but there must be some kind of interesting animal that I can provide a full, happy life within the confines of a small terrarium. :* I'm open to any suggestion, be they Invertebrate, Amphibian, or Reptile. Just not something that is exceptionally difficult to care for.