How old can you be to enter the attraction unaccompanied? Children aged 15 years or younger must be accompanied by an adult aged 18 years or older into the attraction. Related articles How do I contact your Customer Services team? Why do you not have a child rate? What if I'm running late for my time slot? Is SEA LIFE Birmingham suitable for children? I have purchased tickets for someone else/I do not have the card I paid with, how do they collect their tickets?