Hello Widoullaith61
No offense.
I only meant, we are more efficient (and you will have a prompt reply in return), if all information is at hand in one message, rather than asking the above bullet points in 10 different messages. A forum is not very efficient in that regard. And, we are more used to answer specific questions about tickets rather than offering help with finding the best tickets. The latter needs precise information otherwise we risk to give wrong advice.
You can get the ticket at https://sbb-tickets.cc/en
The one-way ticket, full fare, fastest route, is CHF 67.40, return the same day, CHF 134.80.
If you travel later in the year, you could benefit from a Saver Day Pass at lower cost; it is not available the same day, however.
If you stay multiple days in Switzerland, the Swiss Travel Pass is another option. It comes with the Swiss Family Card offering free travel to your kids.
We locals use the public transit system as other use their suburban trains: go to the station, hop on, have a ride, hop off. There is no ’best time of the day as our trains run hourly, or every 30 minutes, or even every 15 minutes.
A screnic route would be Crans Montana - Montreux - Zweisimmen - Spiez - Frutigen - Kandersteg.
Kind regards,
Roland