Made from rare earth, neodymium magnets, Speks magnetic balls are possibly the most popular desk toy ever made. Speks are like magnetic putty, a stress ball and adult building blocks all in one. Mash them around for oddly satisfying stress relief or build a shape to unleash creativity. 512 rare earth magnets - Steel building base - Plastic carrying case Warning! Keep away from all children. Do not put in your mouth or nose. Swallowed magnets can stick across intestines causing serious injury or death. Seek immediate medical attention if magnets are swallowed or inhaled.