It all depends on what you want from the animal. Do you want an aquarium or a terrarium? The frog pictured up top is a dwarf african clawed frog. My friend got 2 of them in this weird self cleaning aquarium (something with the gravel?) and she loved them. I used to keep much bigger frogs, but the thing about bigger frogs is that you need to feed them bigger things. Even the poison darts need to eat fruit flies, which are not always easy to find. Plus, you can't touch the poison darts. The little dwarf african clawed frogs eat pellets I think. Fire bellied toads are a good pet too, and though not frogs, they live in half water half land environment and are gorgeous. I have to say a really cool frog as a pet is a White's tree frog (or if you need smaller, a green tree frog). They live out of water in a sprayed environment, dont eat anything larger than crickets, and can actually be handled. I had a few of them, and theyre cute, especially when theyre sleeping. The males also make this beautiful call at night (which isn't loud, but really pretty). Good luck with your search!