May 23, 2015 - 8:33 AM
Regional trains from Milan to Domodossola don't require seat reservations.
If you buy Swiss Half Fare Cards, you don't need Junior Travelcards. The free Swiss Family Card, that you can obtain at Swiss railway stations when showing your Swiss Half Fare Card, is sufficient. It's explained in the Swiss Half Fare Card price section. For you, it makes sense to get out in Brig to get your Swiss Family Card. In that case you need additional discounted tickets for your children for the leg Domodossola-Brig, as you don't have your Swiss Family Card during this part of the route yet.
Tickets to the Jungfraujoch can be purchased in advance. Such a ticket will be valid all day (assuming you don't make a seat reservation, which is for a specific train only), so it's no problem to get out during your journey and explore Grindelwald. I don't expect it to be necessary for June though. And buying your tickets on the spot has an important advantage: you can first make sure the weather is fine.
Last modified on May 23, 2015 - 10:53 AM by Arno