Magnetic fidget balls have become a very popular stress relief tool. They are known for their ability calm down and help you focus. They are also great for keeping your hands busy when you're on-the-go. These toys are made from a small, spherical magnetic that is attached to a base. Because you can arrange the magnets in many different shapes, they are extremely fun to play with. Because they aren't heavy, they can be stored easily. can use the Speks set of 512 small 2.5mm magnetic balls to make a variety of objects such as marble houses, cubes, etc.