I can highly recommend Nicky's Kids Town at Lane Cove (there is a Nickys Kids town at Chatswood and St Leonards also) where I take Julia to. Its new been open since July I think, and is not full at the moment and the ratio to kids to babies is at the moment 1 to 3 which is great, they take care of Julia so well and are so friendly, everything is clean and open and spacious and they do a great job.

ETA - happy to answer any questions via PM.