Thanks Annika and Slowpoke. I'm really appreciated.
Ok my first plan is really messed up. Since what you've told me, I've decided to change our plan to a new one.
Day 1 : Go to Bern
Zurich Airport - Bern
Day 2 : Day Trip to Geneva
Bern - Geneva - Bern
Day 3 : To Interlaken (I decided to take Lauterbrunnen as my base. Is that ok?)
Bern - Lauterbrunnen (Check in and deposit our bags) - Interlaken - Lauterbrunnen
Day 4 : Jungfrau Trip
Lauterbrunnen - Jungfraujoch - Murren - (Wengen) - Grindelwald - Lauterbrunnen
Day 5 : To Zermatt
Lauterbrunnen - Sion - Zermatt
Day 6 : Matterhorn Trip
Zermatt - Matterhorn - Zermatt
Day 7 : To Zurich
Zermatt - Zurich (We will deposit our bags here. And will come back again.)
Day 8 : To Lugano (With a light bagpack. My dad really want to go to Como Lake once in his life.)
Zurich - Lugano - Como - Lugano
Day 9 : To Lucern
Lugano - Lucern
Day 10 : Day trip around
Lucern - Schaffhausen - St.Gallen - Appenzell
Day 11 : Day trip around
Appenzell - Vaduz - (Chur) - St Moritz - Zurich
Day 12 : To Basel
Zurich - Basel - Zurich
This is my first idea. Another one is cut Basel out and add Glacier Express.
Day 11 : Appenzell - Vaduz - (Rapperswil) - Zurich
Day 12 : Zurich - St.Moritz - Chur - Brig (Glacier Express) - Zurich
Is the second one is possible? I'd love to do the second one. Cut Basel out and do Glacier Express instead.
What is the better place to go between Basel vs Geneva? Maybe should I cut Geneva on Day 2 out and then go to Basel instead? Is that a good idea?
So what about it? Annika, your Glacier Express plan is really exciting but I can't see what day should I go or what should I cut out from my Itinerary. I really want to ride Glacier Express as long distance as possible too.
Slowpoke, from my new plan, is it better to go from Luzern - Schaffhousen - St.Gallen - Appenzel (Take a night there).
And no I'm not French. I have to go to Zurich and take a flight home. I live in Thailand.
Any walking or hiking? Maybe not too much since my parents, they're like in their 60s.
Thanks to you two a ton! My first plan is really the worst. I'm still open to every ideas and really appreciated to them.