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This set of magnets is used in physics teachingTeaching tools for experiments and demonstrations (science education activities for elementary schools, physics experiments for middle school students). It can also be used for student stationery, children’s toys, etc. It enables students to directly experience the real existence and changes of magnetic fields, vividly illustrate their physical characteristics, stimulates students' interest in learning, focuses their attention, and encourages thinking and imagination. Thus, it greatly helps and promotes the understanding and knowledge of magnetic fields among primary and secondary school students and children. For children with magnetic sensitivity, the N; S poles of magnets can utilize the similar repulsion between them and the Earth’s magnetic field.</t_XXXXXXXX>Principle of Attraction Between Opposite Sexes