Neodymium Magnet BALL Custom Large Sphere Magnet

This magnetic construction toy set is made of neodymium material stick and stainless steel metal ball, trains graphic cognition of your child, also stimulates their spatial thinking and hand-eye coordination. Innovative ideas for your kids to enhance the ability to distinguish colors, enrich their creativity and imagination. Develop brain thinking ability.We have different Stick+Ball quantity combinations which gives you many different buying options. Each components are manufactured within ±5%. Iron balls are nickel coated and are not magnets. However, they are attracted to the magnetic bars. It is popular in elementary school and middle school. Every rods and balls is same size, it will be helpful to understand what is the Pythagorean theorem and how to do 3D modeling.