Parts of this scenario of all adults disappearing were explored in the book Lord of the Flies by William Golding. Now that I think of it, many of the issues in the book were revisited in the much more recent TV series Lost, which also dealt with the survivors of a plane crash on an island. Of course, one major difference was that Lost included females and adult males. And I’ve also read a book by the name of Gone by Michael Grant but this book had a bit of “Magic/Superpowers” and that's not what I'm looking for. So I was wondering what your ideas were on this matter was, and if you had any ideas of what the consequences would be.
Edit: here are a few questions I would like to be answered: how long would a Walmart last having food objects inside? What would be the governance, if any, be? How long would it take for a city/town to make its new laws? What about the "ecosystem"? What animals would be affected by the disappearance of adults? How long would medicines in a pharmacy last?