Meet Speks; from the creators of Buckyballs and Zen Magnets. 512 Mashable, Smashable, Rollable, Buildable, Puzzling, World famous, Fun for adults, All-you-can-build with, Magnetic balls. SPEKS BUILDING MAGNETS: 512 rare earth magnets. Smaller in size than the original Buckyballs but endless possibilities await. CREATE: Build and engineer limitless shapes and structures. STRESS RELIEF: From the board room to the dorm room, mash and smash stress away. INCLUDED: 512 rare earth magnetic balls (2.5mm diameter), metal building base, plastic splitter card, 16-page starter guide, and carrying case AGES 14+ Keep away from all children. Magnet flux index less than 30.