Minimum 1 hour.. maximum - depending on your interest.
If you are a 65 year old train nut like me then two to 3 hours works fine!
From the time they arrive until they are finished.
If you have a child that loves trains, a few hours! If there is an event expect to be there for at least 4 hours, if you have a child. As an adult maybe 1.5hr to 2 hours.
We spent 3 hours between the exhibits, train ride, playground, and toy train area
1 hour
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