From Speks. Made from rare earth, neodymium magnets, Speks Gump stress balls are possibly the most popular and relaxing 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. Mash them at your desk, at the doctor's office or wherever a little stress relief is needed. Three pack.