Yeah, there are a decent amount of people who actually use them for dart frogs. They either put water in the bottom with things for them to crawl out onto, or they put a large number of plants in the terrarium itself to help retain the humidity. I'm not sure if you are familiar with their husbandry, but you need to keep humidity levels relatively high. It could be a simple set up though if you just wanted to mist them every day, and cover up half of the top of the cage to keep water from getting out.