Teachers and parents often scaffold children to help others. Not all help is equally beneficial, however. We know very little about the ways in which children distribute different types of help. Across three preregistered studies, we examined when children provide others with help that can hamper learning (outcome-oriented help, e.g., correct answers) and when they provide beneficial help (mastery-oriented help, e.g., hints). Dutch children (total N = 532, 7-12 years) helped peers from different ethnic groups with difficult and easy tasks. In all three studies, children provided less mastery-oriented help when tasks were difficult. Children also gave less mastery-oriented help to Black peers when tasks were difficult, but only when they liked this ethnic group (Studies 1 and 2). Conversely, children helped White and Middle-Eastern children similarly (Study 3). Children might thus not always provide help that is beneficial to recipients in the long run, particularly when things get difficult and recipients belong to other ethnic groups they like.