Speks magnetic balls are the most fun stress-relief desk toy around! Each individual ball is a 2.5mm rare earth magnet that can be pulled, squished, mashed, or built into a variety of shapes and objects. Keep a set on your desk to be the envy of coworkers or carry ‘em in your pocket to break that pesky nail-biting habit. A perfect sensory toy for ages 14+ Speks contain high-powered, Rare Earth magnets. Even though Speks are half the size of Buckyballs, have a 90% reduced magnetic strength, and meet all safety standards including ASTM and CPSIA, any product that is misused or used by an unintended user can cause injury.