If you are willing to train before you walk, My favorite passtime is enjoying all the very very cool day trips the SBB puts on discount each month. Affordable usually, and include discounted admission/etc. We take one of these each month. I have two children, and they travel free with me with a juniorcard, making this awesome and affordable family time, especially with a few drinks and sandwiches thrown into a daypack.
here is one that is inexpensive (36 chf) with a half fare card from zurich, http://www.sbb.ch/en/leisure-holiday...engelberg.html
and generally, here is a place to search for them each month, there is always one trip half off, and 5-10 that are 30% off. The discount picks change on the first of the month. This is how I have gotten to see most of switzerland over the past 5 years being here: http://www.sbb.ch/en/leisure-holiday...-freetime.html