Brand New and High Quality. It is beneficial for developing the intelligence. The disk can suspend in the air when you carefully practice and perform after learning the physics principles of the magnetic suspending disk. Unique and fantastic scenery of suspension. Physics and Mechanics knowledge involved, a great intellectual toy for kids and adult to play. Promote thinking and benefit intelligence. Inspire curiosity. Cultivate interest of study. Improve analytic and operational ability. Test your ability of balancing, harmonizing, patience and perseverance.