Wow!! I was feeling pretty secure about my decision to go with a chain instead of a bracelet because he could always have it and grow into it. But after reading some of the messages about the bracelets and registering them, I have some concerns. I never bothered to register my son. How important is that? On the back of his charm I put "adrenal deficiency, in case of emergency give hydrocortizone" I thought that would be sufficient. If it is not please tell me.