> give their children cell phones Cell phones have a regressive indicator. When you have less time (single parent, multiple jobs) coordinating with that caregi

> give their children cell phones Cell phones have a regressive indicator. When you have less time (single parent, multiple jobs) coordinating with that caregiver or a backup caregiver (bus, grandparent, friend) is important (and in a world without pay phones). In addition, a phone serves as "cheap" entertainment (games, social networks).