Almost every Friday or Saturday our family goes swimming in the brand new Skien Fritidspark. The place is just huge and the kids love swimming and diving in all the different pools. Eivind and I both broke a new record in the water slide. Did you ever go faster than 12.14 secs? I challenge you to beat me ;-)
Best thing of all; they offer an annual ticket for the entire family (NOK 2,500). With five kids jumping around every week, that's a VERY good offer for such amazing facilities!!