App Went Free: The Amazing Train. Today’s free app, The Amazing Train, is a beautiful adventure story told through the eyes of four children. It is a story in which “reality is infused with fantasy”. In the story, 4 children took a magical train ride in Udaipur, India. Through the story, kids will be immersed in the India culture, with beautiful Indian music, city sights and sounds. There are interactive “?” where kids can tap on to find more information about India, such as traditional objects.