One way to see the City of Melbourne is by hopping on and off the Melbourne Visitor Shuttle, which stops at 13 key destinations covering a large area, and runs every 30 minutes from 9:30am to 4:30pm daily (except Christmas day). A day pass is only $5 and children under 10 are free.
Have you taken your guests on the Melbourne Visitor Shuttle?
I went on the Melbourne Visitor Shuttle when it was free a few years ago. I haven't been on it since. I was a bit disappointed to know that there is a charge for the shuttle now. But I still think that compared to other cities, it's a really cheap way to get around the city for tourists.