Unique Identification Authority of India (UIDAI) introduced a ‘Baal Aadhaar’ card for children below the age of five years. No biometric details will be required to get this blue-colored Baal Aadhaar card. A child below 5 years of age gets a blue in colored Aadhaar known as Baal Aadhaar. When the child becomes 5 years old, a mandatory biometric update is required.