Holiday to Oz

What a great site!
I'm planning a family trip to Oz for January and need some help!
We'd like to have a couple of nights in Hong Kong both ways, mainly to break up the long journey. Anyone know how to do this online? Can't seem to get pricing with the 2 night stop overs.
Lastly, any tips for taking children on such a long journey? They are 6 & 8 and this will be their longest flight. We'll be in economy.
Thanks in advance.
I'm planning a family trip to Oz for January and need some help!
We'd like to have a couple of nights in Hong Kong both ways, mainly to break up the long journey. Anyone know how to do this online? Can't seem to get pricing with the 2 night stop overs.
Lastly, any tips for taking children on such a long journey? They are 6 & 8 and this will be their longest flight. We'll be in economy.
Thanks in advance.