Hi Niki,

The baby bonus is a one off payment and it is currently $3,000 per child. I have heard that after the finanical year this will be increased to $4,000 per child.
The other $600 that your friend told you about was paid in July and September 2004 for the first time. However I am not sure if this is still being paid, think the $4,000 payment may have replaced those two $600 payments. But if you ring Centrelink they will be able to give you all of the details.
Take care Leah