Best ship for 7 year old

We are just starting our research looking at doing an Australia cruise. We have been on Disney and Royal Caribbean which are fantastic for kids. What would be the best child friendly ship that sails Australia?

Carnival Spirit and Carnival Legend are very popular with Australian families. They mainly cruise to the South Pacific.

Royal Carribbean are also popular with families - they offer more variety in their itineraries - going to New Zealand and around Australia, however, they are only here from Sept to April.

Yes, the carnival ships have water based activities areas great for little kids and big ones :) They keep one ship here near year round. It has been "Aussiefied" :) they say, read up on the website or you can shoot me a msg and will see if I can help further.