Kolmården is a large zoo about 140 km drive from Stockholm. It takes less than 2h to drive there.
The zoo has lots of different animals from different places around the world. They also have a couple of shows. All shows are included in the entrance fee, 395 SEK for adults.
We rent a small car to get there. The total cost for renting the car, paying for the miles and gas, became about 750 SEK, 80 EUR.
We started our trip around 8:20, but first had a typical Swedish breakfast.