She was concerned about child labor in the mines, as well as in the silk industries located in Pennsylvania, so she called for a mobilization, called the Mill Children's March to denounce the use of children under 16 years of age. for the exploitation of children in these Factories, since the rich class clearly violated the right to be educated. For Mother Jones it was extremely important that these children, instead of working at such an early age, have the right to go to school.