If I buy a Combo Ticket, do I have to visit both LEGOLAND Discovery Centre Melbourne and SEA LIFE Melbourne Aquarium on the same day?

You must visit LEGOLAND Discovery Centre Melbourne at the timeslot you select when purchasing your visit. If you purchase a combo ticket, you have 90 days from purchase to use both tickets. You do not have to book in a time to visit SEA LIFE Melbourne. Simply take your tickets and you will be awarded entry when you would like to visit. 

The average family spends 2-3 hours at LEGOLAND Discovery Centre, and 1.5-2 hours at SEA LIFE Melbourne. Please see each attraction's website for complete hours of operation.