Do I have to pay for a under 3 ticket? No you do not have to pay for anyone under the age of 3 years. Related articles How old is a child ticket for entry? Are there any age restrictions? Do you offer a family discount for a LEGOLAND® Discovery Center Dallas Fort Worth Annual Pass? When is the quietest time to visit LEGOLAND Discovery Center Dallas Fort Worth? If someone cannot make it, can I get reimbursed for the unused ticket?