Second stage (and thus first change) is literacy. The approx 6-7 year old learns to read. And goes to school and discovers friends not selected by the parents or not out of the back yard of the home. New friends, new influences. Now things like brand competitiveness starts to emerge, I want Levis brand jeans, not the ones mother had suggested, etc.. But most importantly for readers of our blog, any digital media will not be powerfully (probably fully) able to be used. Yes, we have lots of videogames and basic computer programmes for even younger kids but after they learn to read, they can go Google and discover the digital world for themselves. If for some reason you don't have the PC and connection for them at home, soon they will find a best friend who has a PC and broadband in their room and suddenly spend a lot of time visiting that friend.
The above and a ton more cellphone aphorisms, can be found here. Tomi T. Ahonen is a "five-time bestselling author and consultant on digital convergence and mobile telecoms", who is based in Hong Kong. Ahonen lectures at Oxford University's short courses on high tech and convergence.
Thankfully not on life.