While trains travel the world far and wide, one place they haven’t yet helped their passengers to discover is the world beneath the ocean. Until now. With Hannah’s Under the Sea Train the deepest depths of the deep dark blue are brought to the rails with a carriage that doubles up as a fish tank and that’s home to crabs, starfish, fish, a dolphin and octopus. The train itself is a multicoloured steam train which pulls the tank along.