I've been to Adelaide twice, so can offer a tourist's perspective.
My first visit in October 2008 I stayed in a cheap backpacker type place in the CBD, and was restricted to walking distance or help from locals with cars (like Sofaman).
My second visit was in March 2013, staying at a nice hotel (massive room and bathroom, but half the rooms do not have a good view) in the CBD and hiring a car, to check out more of greater Adelaide.

So your options are depending on your budget and resources. If you hire a car, maybe check out one or two Shopping centres for any toys you are after... and do a search of "tourist" options online.
If you stay in the CBD or don't get a hire car, the airport is very close (I walked it in under an hour and a half), and there is a Museum near the Mall if you have a cultural interest (and it was free when I was there in 2008).
If you do get a hire car, just be aware that the *main* road from the Airport to the CBD was (in 2013) a 50 k/h zone. It's a main arterial road in Adelaide, and yet its NOT 60k like most other main roads in Adelaide or any other city, so I got a ticket in the mail some time later for doing 60k instead of 50.

My visit in March 2013 happened to be during a kite festival at the beach, and the CBD is not as crowded and built up as the larger capital cities, so has a more relaxed, nicer feel to the place.

And don't forget that there is a SA meet topic in this section, so if you are looking for a meet, see if anyone local is interested.

Quote Originally Posted by BigTransformerTrev View Post
I got told off for looking at a Playboy in a newsagents when I was 15 on my one visit through there on a school trip. So don't go to the newsagents That is 100% of my experiences of Adelaide

(wow - looking at a softcore porn mag in a shop - it was a low-tech and barbaric age the 90's )
Hmmm... I had a similar experience at the same age at the start of the 90s in Toowoomba while on a school excursion. We were allowed to wander off for our lunch break, and a group of us went into a newsagent, and as teens in a group do - egg on each other to do something naughty like look at the adult magazines. Unfortunately, I was the one holding onto the magazine when a teacher busted us, so was the one punished later.