Enrolments for 4 year-old Kindergarten depend on your local council. For example, the area I teach in accepts enrolments from March 1st of the year your child turns two (central enrolment forms - a system to choose up to three Kindergartens to put your name down for - are mailed to your home but are also available from MCHCs and the local council.

As for three year-old Kindergarten, I find that it tends to benefit the first child in a family more than consecutive siblings (as they learn important social/emotional skills from their big brothers or sisters!). If they have never been to childcare/daycare before, then it can be that 'extra' stimulation some children need.

Be warned that there are usually less places offered for three year-old sessions (ie, 20 instead of 25) and programs tend to fill up fast. Since 3YO Kinder isn't Govt-funded (at this point!!), not many local councils run enrolments centrally and queries should be directed to your local Kindergarten.

Good luck on your decision, Kylie.