I'm proud to call myself Australian because some of Australia's humour is the best ever!
This is undoubtedly one of the funniest things I have ever seen, and most of my friends who are 11, 12 and 13 enjoy the silly but edgy humour and the quotes are great!
I'd reccomend it to a mature 12 year old because they would most likely understand the issues raised in the show, and most 12 year olds in Australia can handle a bit of language.
There are some drug references, strong adult themes and some iffy sexuality, but nothing too bad... its very funny, so enjoy!!