Corns are great as are ordinary garters - I know a lot of herp fans poo-poo garters, but they make for awesome pets, as they're active, reasonably docile, require limited cage space, and even the wild morphs are visually interesting - always get captive-bred snakes, even though it's more expensive than simply going out and catching a local variety, they probably won't house any parasites - a problem for which wild garters are notorious.