It depends on how old your tod/bub is...
I love Pumpkin Patch - great value! (regardless of age group) and I could not live without Bonds! Especially the wondersuit, winter pullovers, thermals, long johns, run around the neighbourhood pants.
David Jones or Myer - childrens department. There is a great selection of clothes from all the designer labels. It will soon be the May sale...stocktake sale!
Bonds cheapest in Big W or K mart. They have extended their range now and it's not just the basic.
others to watch out for: Pumpkin Patch, Fred Bare, Chino and Seed