[Closed] Sweden - what to do?

Wanted to go to SW France for two weeks but can't get good enough broadband (need to do a bit of work) and I've had a pile of work come in.

So it's looking like Sweden (Saltsjobaden nr Stockholm) in August. Inlaws have a spare place there with wifi and my bro in law and family lives there. Any suggestions of what to do? We'll hire a car but have our nearly 2 year old boy with us so massive biking epics are a no no.

Happy to go anywhere within reason - the guide books all witter on about museums and shopping which bore us to tears.

Anything a bit active/out and about/wildlifey is all good! And yes we know booze and food cost the earth!