If you travel frequently with your children on public transport, the junior travelcard or the children’s co-travelcard is the right choice for you. With the junior travelcard or the children’s co-travelcard for CHF 30, children and young people aged between 6 and until 16 travel free of charge for one year throughout Switzerland, accompanied by a parent (junior travelcard) or an adult aged over 16 (children's co-travelcard), holding a valid ticket.
You will find further information on the relevant SBB web page