The fare and the duration of the ticket depend on the zones you cross through.
Finding the fare
Within the zone and duration indicated on the ticket, tickets are valid:
Girls and boys under 14 years old travel for free on public transport in all municipalities where the integrated fare system (STIBM) applies. Simply show the staff your under 14 or under 11 card along with an identity document or just the latter. On Trenord trains (on routes within the STIBM integrated tariff system territory), minors under 14 passengers can travel with just an identity document if accompanied by paying adults. They must have an under 14 card if travelling alone.
Teachers, educators and chaperones of school groups of girls and boys under 14 years old can travel for free on the entire public transport network operating in the territory of the Integrated Tariff System. Simply show this form printed, filled out and validated by the school to the staff, along with an identity document.