I work in a pet store (yes, gasp, I'm a horrible person, etc. etc.) Christmas is a really popular time for people wanting to get first tanks for their kids. A lot of times that means a 1, 2.5, 3, or 5 gallon tank. I'm always at a loss for fish to suggest for such small tanks. If they go bigger than a gallon I suggest a betta, but that's about it. Is there really anything that can be kept in such small tanks? What about non-fish animals, like dwarf frogs, crabs, or shrimp? It's hard enough to convince people that goldfish and saltwater are not options for these tanks with out having some alternative to offer them.