Publishing the Youngins?

Does anyone know what the legalities are of publishing minors (i.e. people under the age of 18)? I ask this because there is a possibility I might be working with several people who are not yet adults on a publishing basis and I am not 100% sure what sort of things I need to be aware of. The only thing that I am certain I need to do is have their parents co-sign on the publication contract. Is there anything else I need to be aware of? Do you know someone that might be able to answer this question? (Don’t click the read more, there isn’t any more after this!)