Jul 13, 2010 - 6:59 AM
All relevant details concerning the Swiss Flexi Pass, including an overview of the network on which the Swiss Flexi Pass is valid, can be found here
I think the fact that you are not mainly travelling by train is not very important in your case.
The Swiss Flexi Pass for you and your wife together gives you a 15% discount (this is called a Swiss Flexi Saver Pass
- scroll down). You can choose either 3, 4, 5 or 6 days on which you can travel for free.
Your children will travel for free (up to and including 15 years of age).
A Swiss Flexi Saver Pass will give you - parents and children - free entrance into more than 400 museums on the 3, 4, 5 or 6 free travel days.
A Family Museum Pass
will cost you CHF 255 (this is a pass with a validity of one year!) and two Swiss Half Fare Cards
cost 2 x 99 = CHF 198, making a total of CHF 453.
On top of this you have to pay (at least) half fare prices on all your trips.
A Swiss Saver Flexi Pass will cost you between 2 x CHF 212 (3 days of free travelling) and 2 x CHF 337, but the days of free travelling will save you a lot.
Not knowing what your exact travel plans will be I cannot make any further calculations, so this is the best I can do for you and I hope it has been of help.
I wish you all a very pleasant stay in Switzerland!