Age isn't as important a kid's maturity level, ability to follow home (and their schools') rules.  and their sense of responsibility.  But when you hand your children cell phones, you're giving them powerful communication and media- production tools. Age isn't as important a kid's maturity level, ability to follow home (and their schools') rules.  and their sense of responsibility.  But when you hand your children cell phones, you're giving them powerful communication and media- production tools.