The authors of the open letter claim that children can benefit from work even if they are below the minimum age set for “light work.” Although there may be benefits in some instances, many studies have found that work by young children or long hours of work are harmful to both their schooling and future earning potential. For example, research across 11 countries in Latin America found that in all 11 countries, working children performed significantly lower in school than their non-working counterparts, scoring up to 17 percentage points lower on tests of language and math.
URL : https://www.hrw.org/news/2016/04/04/when-it-okay-children-work