Another vote for Denmark. We went this summer and stayed in a summerhouse just outside Lumsås, Zealand, about an hour from Copenhagen airport.
We have Danish friends, so they rented the summer house through DanCenter, and it was fantastic. Lots of brilliant places to visit - we went to the glass museum and workshop, Summerland, fire engine museum, and spent lots of time on the beach, which was stunning. White sand, very clean, sea fairly shallow for quite a way, and even though the weather wasn't great, we still swam a few times.
It's all about outdoor living, barbecuing, children playing outside - it was very safe and very relaxing.
We then spent a few days around Copenhagen, going to Tivoli, Experimentarium and the aquarium on our way home.
Food and drink is more expensive but the quality of the meat, fruit and veg was incredible compared to our equivalent here.
Can recommend.