What's the cheapest and quickest way to get from Liverpool to Birkenhead? Ferry or Train?

probably a Zone ticket for all areas in the North West and it will cost £4 per adult and £2 child and can be used all day no time limits on Saturday (weekends and bank holidays) get the bus from Sir Thomas Street through the tunnel to Birkenhead market bus station (5-10 minute journey) and a bus from there to New Chester Road a href="http://www.arrivabus.co.uk/multi-journey-saver-tickets-in-north-west/" rel="nofollow"http://www.arrivabus.co.uk/multi-journey…/a