If you haven’t bought tickets yet:
Buy a multi attraction pass online (2, 3 or 4 attractions).
This lets you visit a combination of SEA LIFE, WILD LIFE, Madame Tussauds, and/or Sydney Tower Eye within 30/60 days depending on the ticket type.
If you’ve already bought a ticket:
You cannot add extra attractions online after purchase.
To upgrade, you need to visit the attraction in person and request an upgrade at the admissions desk.
Upgrades are only available for tickets purchased directly from the official website or venue.
Tickets bought through third-party companies may not be upgraded.