Jun 25, 2015 - 9:38 AM
Thank you for joining us here. The Swiss Pass is called Swiss Travel Pass now (Swiss Pass is a different product, see here). There's indeed no 5-day version. You can buy regular tickets from Paris to Lucerne, to use your 4-day pass from the next day. If you end your stay in Zermatt, the pass covers the trip to Basel, so you only need tickets from Basel to Paris. Please see the below pages for ticket and pass information. You can order all of it together:
A Swiss Travel Pass is for consecutive days. Every day is a travel day, whether you actually travel or not. You can use it for museum visits every day.
Eurail passes only pay off if you travel a lot in multiple countries; but you only do one return trip in France.
Personally I would not stay in 3 towns in 5 days. That doesn't allow much flexibility weather wise. You could stay in Lucerne, then travel via Interlaken to Zermatt, for example. Perhaps with a side trip to Kleine Scheidegg if you want to see the Jungfrau region too and don't mind a very long day. There is a chocolate factory in Broc, but it's not near the towns you stay in. You may want to consider the Swiss Museum of Transport (great for children anyway), which also has the "Swiss Chocolate Adventure". It's not a factory, more like a theme park. But much easier to get to if you stay in Lucerne.