Get a free ticket to the pregnancy, child and baby expo in your state. There is a direct link to the Adelaide one on the front page as that is first coming up march 22-24, for the other cities/states, click on the right state and there will be a link on the following page explaining how to get your free ticket. (Called free ticket)
Requires you to provide personal details and email etc. and join as a "expo friend"
Says one free ticket per family/group.
Never been to one of these so not sure what they have but hopefully this is useful to a new parent or a family wanting to go.
Did this last year too. Unless you are going alone the idea of having to pay to get into one of these things is like paying to be delivered advertising to me.