Before entering the World of Dinosaurs main area, we first jumped aboard the Rex Express train that takes you near the dinosaurs. It was £2 per person and we really enjoyed the experience. It allows you to see some of the dinosaurs up-close and to see how my youngest would respond to seeing the animatronic dinosaurs in action. You don't necessary see any additional dinosaurs than you will see walking through the World of Dinosaurs attraction but my children enjoyed it.