I attempted to set up the 2 child tickets, as Adult tickets, to give more variety, but was unsuccessful.
I was going to create 3 Single tickets for different distances, e.g 1.50 / 2.30 / 3.00 depending on distance travelled, A Day ticket, and a 7 day pass.
From what I have picked up, the age min and max values have all been set up as 0 - 200. You also need a sound file in the voices folders for each ticket, otherwise the passengers cant 'ask' for the ticket.
Despite this, I still cannot get the passengers to buy the new tickets. I suspect there is some sort of script somewhere that governs which tickets the passengers buy, but I find anything, so Im hoping it will be covered in the SDK when it is released...