Well, you technically don’t need a major in child life/child studies to become a CCLS. The only thing that is required is that you take a course taught by a child life specialist and many universities offer it online (I took mine online!) Also, you will need to have 10 courses relating to children in some way – the following link will have more information. Hope this helps! Best of luck to you 🙂
http://www.childlife.org/Certification/Getting%20Certified/EligibilityRequirements.cfm