Steel wheels and actual steam train. Crown locomotive works, large gauge 4-4-0 if I recall correctly. Kept in immaculate condition, and with a train station that strongly resembles the one at Disneyland.
The track was quite large, with the ride lasting about 15 minutes. (Based on what I've seen in videos like this one, I've never seen the site)
[
www.dailymotion.com]