NAVRANGI Marble track top cubes help dispel boredom when you are alone and don't know what to do next, promote children's growth, also can promote your little family member's brain exercise, useful and practical. Nice gift: Magnetic orbit ball toy is not only played by yourself when you are tired, but also you can recommend it to your classmates, friends, family and so on, providing them a easy way to release stress after a day work. Package includes: Magnetic orbit ball toys. Promote Parent-child Relationship: Promote parent-child relationship, suitable for children's play to expand social circle.Drop-resistant Plastic: Made of drop-resistant plastic material with bumpy particles on edge to exercise children's grasping ability and massage palm.Fun for the whole family. Especially ideal for people who try to bite their nails, smoke, shake legs and all types of attention disorders. The arc-shaped design accords with ergonomics, feels comfortable and can be used for a long time. a good choice to kill time, very suitable for adults and children with anxiety and autism.