3 HOURS AND MORE, NO LESS!!!!!!The most fun science museum I've been in my life. If you're scared off by the name "museum" then don't worry. It is indeed a place with a tremendous amount of interactive learning. You will have the best experience ever. And besides you'll learn a lot without even noticing it.The museum has 4 floors, if you rush maybe you can make it to all floors and areas within 2 hours. If you want to get the full experience, going into the submarine, the Robot Google thing, Mirror Maze etc. you will at least need 5 hours.IT'S WORTH YOUR TIME!!!