Mizen's Railway is a super miniature railway that runs around the grounds in various circuits, giving rides. It's run by the local model engineering society who opens it up on selected dates throughout the year. Do check ahead before travelling.
It's easy to reach Mizen's Railway in Woking, by train. Simply hop on a train to Woking station - then it's a 45-minute walk from Brookwood station, or take the 91 bus from Woking station - or indeed one of the taxis for 10 minutes from the station too.
For more visitor info including opening times, visit Mizen's Railway’s website.