Fast delivery, good quality. 100 pieces are but surprisingly little, when put together to form a cube. The cube itself can be disassembled easily, since the partial cube always have only 2 magnetic poles, but 6 areas. So you stick together with each getting 2 of 6 neighboring cubes, so that the adhesion is not great. Every man for himself, however, as befits neodymium magnets, powerful. A keliner 5mm cube is quite enough to secure a card fixed on the refrigerator door. But it just makes fun with the magnetic cubes to play and to form shapes.