If it's not tall I wouldn't suggest a crested gecko. You could go with a couple leopard geckos. Or a trio or quad Viper Geckos. Try some of the ground dwelling geckos, frog eyes, dune geckos, or banded geckos. If you really want something cool go for the japanese and chinese cave geckos they are really sweet looking. They need high humidity so it's something that you might need to focus on the humidity more so then with leopard geckos.