Legoland has this offer of 1 adult and 1 child under 6 for 15 pounds. The tickets that you print neither mentions adult or child or the age of child allowed !!! We visited yesterday and noticed that there was no one to check as you need to go to turnstiles straight away and scan the tickets yourself so there is no checking done. The catch is to go only on weekdays allowed during term time. Offer is not valid on weekends. Check for the dates on the legoland website.