Children by age three are at least sometimes permanently expelled from the household and form groups called age-bands consisting of those within the same age group. The 'Junior Group' consists of children from the ages of three to eight and the 'Senior Group' consists of those between eight and thirteen. No adults look after the children, who teach each other the basics of survival.Wikipedia casts some doubts on this practice, but I'll be blunter: I don't believe this at all.
Has any culture ever done such a thing?
I'll give you this much: Any given Friday night at my house pretty much resembles this quote--it's basically lord of flies amongst the kids running about.
But we do feed them...