216pcs cube neodymium magnet balls, 3mm

1)build anything which you can imagine, like 2-d or 3-d objects. 2)not only just a toy, you can use these balls to make jewelry or fun creationssuch as flowers, leaves, ball, , etc. 3)this product are balls with excellent technology, it is not easy to fade after using. can stand long- lasting friction and strong antioxidant ability. 4)perfect for testing your mental skills and challenging your patie