Wired:

Buckyballs are officially discontinued. If you don’t have any Buckyballs or Buckycubes and don’t get some soon, you never will.There are more than a billion of these magnets in consumers’ hands and only 24 reported incidents of children under 14 ingesting them. Skateboarding is statistically 890 times more dangerous than having Buckyballs.

As the story points out, you can still buy Buckyballs for a limited time and the company will continue to make other “Bucky-like” products.