Do I have to pay for a under 3 ticket? No, anyone under the age of 3 goes Free at SEA LIFE Michigan. Related articles Why do I have to pick an entry time? What items cannot be taken into SEA LIFE Michigan Aquarium? Are there any restrictions for children at SEA LIFE Michigan? How do I use a standard combination ticket at LEGOLAND Discovery Center? How much are Toddler Time Tickets?