Hello NIKOLEE,
Accompanied children under six years travel free of charge.
Children from the age of six up to their 16th birthday and children under six travelling alone have to purchase a half-price ticket or pay any designated minimum fare.
When accompanied by an adult with a valid ticket, children aged six to 16 years can travel 2nd class for CHF 16 for the whole day. The 1-day travelpass for children costs CHF 32 for 1st class.
With the Junior travelcard for CHF 30, children from the age of six up to their 16th birthday can travel on public transport for a whole year, accompanied by a parent with a valid ticket.
More information can be found on our website:
https://www.sbb.ch/en/travelcards-and-tickets/tickets-for-switzerland/children.html
Have a nice day
SamanthaAd