RecruitingBehavioural interventionEmbracing Morning BReakfast and Activity for Classroom EngagementThis experiment will test the effects of healthy breakfast and morning exercise on children's focus and classroom behavior. Food and exercise each influence child focus, but little is known about their effects on classroom behavior and less about their combined effects. For one week (Monday-Friday), 10 children will be randomly assigned to receive healthy breakfast and morning exercise, 10 assigned to only healthy breakfast, 10 to only exercise, and 10 to neither. After exercise and breakfast, study staff will assess how focused children are during class-time, ask them to complete puzzle-like tasks, and wear a helmet that measures brain blood flow