Magz 89 Use the wonder of magnetic power to build endless creations. Features: -Includes (52) 2.5" magnetic rods and 37 steel spheres. -Multi colored. -Magnetic construction. -Collectible. -Educational. -Powerful rare earth magnets. -Therapeutic, award winner. -ASTM/CPSC Compliant and Safe. -Use for age 5 and up to adult.