there is a new release parents magazine in and around Perth called OFFSPRING.
I looked through a copy yesterday and there is a several page section on taking babies and children to Bali.
Lots of things to do with the kids and also full of services like emergency medical, baby sit, equipment hire,suitable acomodation, hygene tips, fun parks and the like.
Not sure if it also on the internet but may be.
I have copied the Bali pages for my future reference.