When you purchase a Combination ticket you may visit LEGOLAND Discovery Center within 14 days. The time slot you select to visit is your arrival time to LEGOLAND Discovery Center Dallas / Ft Worth. You're welcome to visit SEA LIFE any time during the same day. This can be before or after your visit to the Discovery Center. The average family spends 60-90 minutes at SEA LIFE and 2-3 hours at LEGOLAND Discovery Center. Please see each attraction's website for complete hours of operation.