"Child labor" is, generally speaking, work for children that harms them or exploits them in some way (physically, mentally, morally, or by blocking access to education).
Child labor helps children learn
( z1 help :ARG0 ( z2 labor :ARG0 ( z3 child ) ) :ARG1 ( z4 learn :ARG0 z3 ) :ARG2 z3 )