Reptile & Amphibian Forums

I have a 12x12x12 vivarium that has been established for 4 years and I would like to add an animal. The enclosure was originally put together for dart frogs, but then I decided to hold off. I know that this is small for most reptiles, so I want to be sure I purchase the right animal for the enclosure. The substrate is gravel on the bottom for drainage, and then soil for the plants. The plants are pathos, a small palm, and a bromeliad. I am going to a reptile expo this weekend and I am wondering what my options are. I would prefer some sort of gecko, but understand that most need a little more climbing room (Crested, Gargoyle, Tokay). I would be down with a praying mantis, tarantula, frog, or toad, too, but not a leopard gecko or anole. Any suggestions? Thank you!

Thanks for posting.