We moved to Adelaide less than a year ago and my kids have already outgrown the bikes we bought them when we arrived. I am also selling a Trail-Gator which is a great device for attaching your kids bike to your own when they get too tired to ride any further.
Boys Avenger Bike - suitable for 4-6 year old $20 - still available
Girls Vintage Style Bike - suitable for 6-9 year old. $25 SOLD
Trail-Gator great condition only $50 - SOLD
The boys bike does have a small tear on the saddle but otherwise in great condition. Also comes with training wheels.