A kis who is more then 12 months can apply for Aadhar card. But biometrics data, such as finger prints are not nacessary for a child till 5 years, because that bio metrics info is not stable in case of child.
The Aadhar card will attach with parent Aadhar card in case of kids
When a kid turns 5 years age his/her biometric data will be collected and linked to his/her Aadhar card
After 15 years age final bio metric data will submit and attach with aadhar card.