The magnets are wirlich very very small. At first I was disappointed and thought they were too tiny. But they are extremely strong and excellent adhesion (even thick paper and fabrics). You will be liable even so much that they would collect only with difficulty. After some time one finds but some tricks abzubekommen the magnets. Very suitable for teaching, since the magnets does not detract from the rest. In addition, children and adolescents are just as enthusiastic as strong are the small "Power Dinger".