Magnetic balls are small magnetic spheres made of strong rare earth neodymium - ndfeb material. These little magnetic balls are very addictive. They stick together because theye magnets. With these small magnetic balls you can make complex sculptures, build basic patterns and shapes or cool magnetic jewelry. With these magnetic building spheres your life will never be the same. Just look at all the designs and forms on the internet you can make with these rare earth magnets. Check some video to make original cube or pyramid. Use some tricks to make nice designs more quickly.