It's a really nice zoo with a lot to offer. First of all, be sure to be there early in the morning (10-15 minutes before opening). Otherwise, parking will be a serious problem. We arrived 20 minutes past the opening time, and the parking was about 60% full. They have some special storage rooms for small and big strollers, which is very useful. There are also small storage units for things like backpacks, jackets, etc, but they work with 2 kr. Coins, so don't waste any other type. If you don't bring coins along, you can still exchange money for some special coins to use at the gift shop. Be careful what you need to store and what you take, because you need to use again 2 kr. Coins, every time you open and close the locker. Nice inside restaurant, with a big area to sit, eat and relax. If you have some snacks or sandwiches from home, there is an outside area that you can use for that.
There are small "games" you can play with your entourage, like every time you enter an area, you can try to find and identify all the animals. The tigers enclosure is next to the picnic area, so if you're lucky, you can enjoy your sandwich, while the tiger enjoys his meal. It's a really good place to spend your day in. That's about all the time you need to enjoy this zoo.