Auckland Zoo is one of the best zoos I have ever been to. You can easily spend a day here walking through the different enclosures and you can bring your own food or buy it from a nice café on site. The zoo is fantastic for kids - its designed to be interactive and engaging and there are numerous playgrounds located around. Also, next to the zoo is Western Springs Park where there is a large playground and several duck ponds - it's a lovely spot for a picnic or just a walk.