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Build interesting shapes, make cool desk art, play classic marbles games, make buzzing sounds, experiment with Newton's Cradle, and more with a string of super magnets that are perfect for fidgeters. These MEGA Nanodots are 15mm marble-sized magnets made from military-grade ceramic ferrite. Flexible rubber covered in soft black felt and containing iron weave, these nanodots attract ferrous magnets. These MEGA Nanodots come with the NANO Spool Canister that keeps your marbles neat and accounted for.

Safety note: Customers must be 14 years old and above to purchase. This product contains small magnets. Swallowed magnets can stick across intestines causing serious or fatal injury. Seek immediate medical attention if swallowed or inhaled.


  • Color: spectra
  • Materials: military grade ceramic ferrite, flexible rubber covered in soft black felt
  • Contains iron weave
  • MEGA Nanodot diameter: 15mm
  • 27x larger than regular Nanodots by volume
  • Attractive to ferrous magnets
  • For ages 14+ only


  • 30x MEGA Nanodots (Spectra)
  • Reusable spool canister
  • Instructions


  • Ships to Contiguous US
  • Expected Delivery: Jun 18 - Jun 25
  • Expected International Delivery: Jun 22 - Jun 25


  • 30 day return policy