Convention concerning the Prohibition and Immediate Action for the Elimination of the Worst Forms of Child Labour, http://www.ilo.org/ilolex/english/convdisp1.htm . defines the worst forms of child labour as (i) all forms of slavery or practices similar to slavery, such as debt bondage and serfdom and forced or compulsory labour, including forced or compulsory recruitment of children under the age of 18 for use in armed conflict, (ii) child prostitution or pornography, (iii) the use of children for illicit activities, such as the trafficking of drugs and (iv) any form of work which is likely to harm the physical or mental health of children.
Convention concerning the Prohibition and Immediate Action for the Elimination of the Worst Forms of Child Labour, http://www.ilo.org/ilolex/english/convdisp1.htm . defines the worst forms of child labour as (i) all forms of slavery or practices similar to slavery, such as debt bondage and serfdom and forced or compulsory labour, including forced or compulsory recruitment of children under the age of 18 for use in armed conflict, (ii) child prostitution or pornography, (iii) the use of children for illicit activities, such as the trafficking of drugs and (iv) any form of work which is likely to harm the physical or mental health of children.