Zagreb has 15 tram lines that run from 04:00 - 23:50; the night trams (4 lines) are totally unreliable and unadvised, yet they run from 23:50 - 04:30. You can purchase 1,5 hour tram tickets at kiosks for 8kn, or if you buy on board the tram it’ll cost you 10kn. Daily tickets are 25kn. Juts to let you know, if you so happen to board the new high-tech low level trams, you cannot buy tickets from the tram driver therefore the kiosk is your best option. Children under six ride free. Stamp your ticket once you board: an unstamped ticket is as good as no ticket at all. Getting caught without a ticket costs an additional 210kn and is not a pleasant experience. Checks are inconsistent but not uncommon.