How old does my child have to be to qualify for a T-Mobile Little League Call Up Grant? October 23, 2023 18:37 Updated Eligible families with children league age 4 - 16 qualify to receive funding. Click here to verify yourchild’s league age. Related articles Does each child in the same family need a separate T-Mobile Little League Call Up Grant application? Pre-Season Check List Are you still accepting applications for the T-Mobile Little League Call Up Grant? What are examples of qualifying documents? What amount should I request if my league offers an early registration discount?