Are there any restrictions for children at SEA LIFE London? Children aged 15 years and younger must be accompanied into the attraction with an adult aged 18 years and older. Related articles Do Under 3's need a ticket? How old can you be to enter the attraction unaccompanied? Do you have a re-entry policy? Can I feed the turtles at SEA LIFE London? Are there any nice cafes near SEA LIFE London?