Seven Dwarfs Mine Train officially opened May 28th and it completes the New Fantasyland Expansion at Walt Disney World’s Magic Kingdom. The audience for the Mine Train is younger children and is a step between The Barnstormer and Thunder Mountain. This attraction is one of the top must see so make sure you get a Fastpass+ or you may have a long wait. I would take time either before or after your ride to take in the details of the centerpiece attraction.