Such excellent advice from everyone, really appreciate it. This is a great community.
I took her down to the wharf again this afternoon and tried out a few of the techniques I'd been advised of from this thread and well what do you know, we caught one puffer fish after the other! The little one was absolutely stoked. We had a great time. She got to play with them in the bucket and I explained to her about why we release them back into the water, which she had great fun doing one at a time.
And yep I reckon a yabbie pump will be next on the agenda and then we can progress to buying a couple of rods. Excellent suggestion about Camden Haven too, it is absolutely beautiful down there.
Will no doubt be back again when I need another novice question answered haha. Thanks heaps to everyone.