You can spend as long or as little as you want at the attractions, but here's a guide as to how long most visitors spend at each of them:  Visits to Cadbury World usually take 2-3 hours Play sessions at LEGOLAND Discovery Centre Birmingham last around two hours Remember, you can use your tickets once for your second attraction for up to 90 days, so don't worry about needing to see them all in a short space of time!