Do I have to pay for a under 3 ticket? No, anyone under the age of 3 goes Free at SEA LIFE Grapevine. Related articles Can I take a camera into SEA LIFE Grapevine Aquarium? Can I change the date/time of my booking? What items cannot be taken into SEA LIFE Grapevine Aquarium? Do you offer Military discount? Do you offer a family discount on tickets?