... 216+6 strong magnetic NdFeB balls. (NdFeB is a permanent-magnet technology) magnetic bead toy Ah, carbon - how sweet you are ... . You are the basis of life on Earth, you let our pencils write, and you form the most ... . Now, imagine replacing those hard to play with atoms, with rare earth magnetic spheres. Suddenly, you haveBuckyBalls Magnetic Building Spheres, and now ...