What age is a child charged for a Melbourne Big ticket? Melbourne Big tickets are only valid for adults (13+ years) and children (3 - 12) Children 2 and under are free to both attractions. To purchase your combination ticket please visit here. Related articles What are the Little Playtimes tickets? Do you offer a family discount for tickets? How do I contact your Customer Services Team? Can I use a 2 for 1 voucher in conjunction with a Combination Ticket? How far is SEA LIFE Melbourne Aquarium from LEGOLAND Discovery Centre Melbourne?