We went to Dreamworld as a family, grandparents (my husband and I), daughter and her twin 9 year old boys. We all had a great day. However, I was disappointed to see a few of the attractions meant putting money into a slot to operate such as the remote controlled boats which I think was $2. I felt that having paid enough for entry, that everything should have been included. Not too much of a problem if you can steer the children away from those things.
The children enjoyed the Madagascar show and the rides - they suddenly became very brave and wanted to go on rides which we knew would have been too much for them but we did allow them to join the queue for a few of the more adventurous rides that were a bit more suitable for their age. We went out of school holidays so the queues were never too long.
Coming from Melbourne, we booked our tickets beforehand through RACV and got a discount plus there was a discount for being seniors - every little bit saved counts.