All children turning from 3 to 11 years, receive free entrance to LEGOLAND Deutschland on the day of their birthday. Requirement is a document that confirms the date of birth/age of the birthday child (child passport or birth certificate).
In order to receive the free ticket for the birthday girl or boy on the day of your visit, please report to the service desk to the left of the LEGOLAND entrance, and bring an official proof of age.
More information here.