Can some one explain to me what this is all about....?

I keep getting asked have i enrolled ALL 3 of my kids in 3 yo kinder yet.....then some say have i enrolled for 4 yo kinder....

Whats the difference and what one am i ment to have them enrolled in?

Ive nto done anything yet.....Chelsea is 3 in November so should maybe pull my finger out....Jasmine isnt 3 until October 2010...and as for Zachery he wont be 3 until January 2013....

So why is it that i keep being told they should be enrolled at birth.

Is it a compulsary thing i have to send the kids too?

Vic teaching system is very different to NSW where i am from.

Also we dont know how long we will be here for....i want to be back in NSW asap....but we are not sure what to do yet.

Is it worth me even thinking bout these kinders?

Sorry for all the questions..im just really cunfuzzled