Kristiansand Dyrepark is the big family draw on the edge of the city, large enough that it feels more like a day out than a quick zoo stop. The park mixes animal enclosures with themed play areas, rides, and performances, with Nordic species sitting alongside more exotic animals.
It is especially useful if you are travelling with children, but adults get something out of it too: the setting is wooded and spacious, and the Norwegian animal exhibits give a gentler change of pace from the beaches and harbour. In summer, arrive early and treat it as a full-day excursion rather than something to squeeze between city sights.