Best places in Slovenia for a family?

My parents are now deciding where go on our summer holiday. We're a family of 5 - 2 adults and 3 teenage girls (ages 12, 14 and 15). By browsing the web, I thought that Slovenia sounded lovely. I would love to go there but my parents need a bit of persuasion! We would probably split the two week holiday in to... show more My parents are now deciding where go on our summer holiday. We're a family of 5 - 2 adults and 3 teenage girls (ages 12, 14 and 15). By browsing the web, I thought that Slovenia sounded lovely. I would love to go there but my parents need a bit of persuasion! We would probably split the two week holiday in to two parts so one week we would like a city and the other week a nice lake where there is lots to do (canoeing, kayaking etc etc). Does anyone have any ideas btw the holiday has to be of a reasonable price :L also nothing too boring.
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