Watch It's a Great, Great World! full movie online Movies123. Watch It's a Great, Great World! 123movies online for free. It's a Great, Great World! 123Movies: It’s A Great Great World is set in Singapore’s legendary amusement park Great World, which was also affectionately known in Hokkien as Tua Seh Kai or 大世界. Spanning the 1940s to the present day, the film tells the stories of a multitude of characters who lived, worked, played, sang, danced and fell in love in Great World.