Yes, it's possible, if your carolinas are siblings, and the byproduct of someone else's project. If you bought them separately, it's still possible to get common morphs like amel, anery, hypo, maybe motley. You just never know.
There's a good article, I think down in Chip's private forum, about Should I Breed My Snake? or something like that. Worth reading. It's always best to hold off until you have a specific breeding goal in mind, and know your local market, and are just knowledgeable about breeding, incubating, hatching, starting feeding, etc. I have some articles down in my private forum, and Rich Z has a post, I think a sticky in the Breeding section, about Murphy's Laws of Breeding.