A parent donated a small fish tank; the students really want a class pet and I think it could be a positive addition to our classroom. What would be better to get: 2 goldfish or 1 beta (fighting) fish? I am also thinking big here and thinking of a guinea pig... but maybe not such a good pet for 6 year olds? The fish would be the easiest to maintain, but I wish it could be something they could actually hold and pet. But maybe I should just keep it simple. Thoughts? Experiences on 1st grade classroom pets and which animals work well and which ones do not?