Hello there,
WHV is not an option but from many countries where they are not eligible, or simply want a year out, sabbatical etc. family groups can go out on a temp study visa if one parent studies (the other gets pt work rights, if Post Grad ft).
Catch is you would have to pay full international fees for school for your children...from AUD6K each per year.
Experience wise great for all the family and you do not need to commit...for now if you study for two years students can apply for
PR onshore
http://www.immi.gov.au/skilled/gener.../880/index.htm
Personally as an education agent (Australian) dealing with various nationalities it is a very logical thing to do, i.e. allows you to study, work and live in Oz to see if you actually like it :) which is not a given. This is vs applying for
PR offshore (without ever visiting Oz), selling house etc.
Cheers Andrew
http://www.aiec.biz