I have a 4-day Swiss Travel Pass (STP) for 2 adults and a family card for 1 child under 16. But on the 5th day, we are traveling from Switzerland to Venice, Italy by train. Since the STP is not valid beyond 4 days, I have bought Day Saver Pass (note: I don’t have half fare card) for the 2 adults.
Question: Will the family card (which is valid for 30 days) still work for the child? Or do I have to buy a 1 day travelpass for the child for CHF16?