@Martin. Loads to do. Something that works well for me is to meet my wife and children at the top of the mountain where there are children’s play areas. They take the lift and I leave a couple of hours earlier on the bike. After we have finished playing they take the gondola and I go my way:)
Anyway, there are also some great lakes for swimming, in or outdoor pools, huge play areas, summer sledging!, steam trains etc -> it’s a tourist area, there’s loads to do.
Another thing that works well is that I get up early, get out on the bike for 3 or 4 hours, come home at 10ish and spend the rest of the day doing family stuff.
One thing you need to know, mtb’ing over here is “normaly” following a wide track upto a hut for something to eat / drink and back down a similar way. Don’t expect to find the best single trail in guide books, you need local knowledge. Bike shops are the best start but talk to as many bikers as you can.
My offer stands to anyone who is in this area, I am happy to show people some great trails, if I am not around then I would mark a map and leave it for you. Drop me a mail if you need more info.