DH and I are in need of a mini break and we have decided to go to Sydney for a few days in October to wind down and have some fun.

We're going to a concert while we are there and we will probably go to Taronga Zoo and Paddy's as well.

What are some fun things two adults (who behave like kids) can do in Sydney? I would love some suggestions of what you Sydney-siders do for a fun day out. We will be staying in the CBD.