Two main instruments specifically encapsulate the rights of children on a global and regional level, respectively:

African Charter on the Rights and Welfare of the Child
ACRWC 1999
The Children's Charter is a comprehensive instrument that sets out rights & defines universal principles and norms for the status of children. The ACRWC & the CRC are the only international and regional human rights treaties that cover the whole spectrum of civil, political, economic, social and cultural rights.