The Kingston Flyer's popular Thomas and Friends service departs the station at 10am and 1.30pm tomorrow and Sunday.
The vintage locomotive wears a Thomas face and the Fat Controller will be on the platform to welcome youngsters and pose for photographs.
The train heads for Fairlight for a magic show and lolly scramble there before the scenic return journey.
Children aged under 14 and accompanied by an adult ride for free.
Standard ticket prices of $45 return and $35 one-way apply for adults.
"We had more than 200 people last Sunday afternoon and similar crowds the other three runs last weekend," Kingston Flyer office manager Robbie Caldwell said.
"We're taking bookings for the weekend all week and advise people to book early to avoid disappointment and for us to know how many carriages to put on."
Mr Caldwell said the company was considering other themed weekends later in the year.
The Flyer operates journeys on a 14km rail track from Kingston to Fairlight that has been preserved from the original railway line between Kingston and Lumsden.
The train consists of two AB Pacific Class steam locomotives, which were built in New Zealand in 1925 and 1927, plus seven steam-heated wooden vintage carriages dating back to 1898.
The original Flyer operated a passenger service between Kingston and Gore from 1878 until the mid-1950s.
It provided a connection to Queenstown and the surrounding runholder stations by meeting up with the lake steamers at Kingston wharf.
