CWC has facilitated the coming together of working children as a union - Bhima Sangha - to fight for their rights as workers and as children. Bhima Sangha is a union of, by and for working children. It has a membership of 13,000 working children in both rural and urban areas, in Karnataka. Since its inception in 1990, Bhima Sangha has been a powerful advocate for the rights of working children. It is equally concerned about improving the quality of life of the parents and communities of working children. In the eight Makkala Panchayat Toofan areas, Bhima Sangha has created a political space for itself through its participation in the Task Force. Bhima Sangha has been instrumental in setting up Makkala Panchayats.

At the national and regional level, Bhima Sangha has links with other working children and is assisting them to form their own unions. Bhima Sangha conducts workshops for representatives of working children in which they provide information about child rights and unionisation of skills.

Bhima Sangha was a member of the organising committee for the first international meeting of working children. It was one of the unions representing Asia in the child labour conferences at Amsterdam and Oslo. Bhima Sangha is one of the founding members of the International Movement of Working Children and is presently its Asian Regional Co-ordinator.