Hi - I would like to ask if my 14 year old son can travel with me using a Junior Card (30 CHF) if I buy a 1-Day Saver Day Pass (without Half Fare Card) for 1st Class travel from Basel to Zuoz. I will be returning using another 1-Day Saver Day Pass about one week later. Is it correct that I must buy his Junior Card at a station and not online? And finally, can we travel to Zuoz via the Albula line on a regular service. Many thanks, MB