Crags Magnetic Fidget Putty, Black, White Tin

Meet Speks; the return of the world’s greatest DESK TOY from the creators of Buckyballs and Zen Magnets.
512 Mashable, Smashable, Rollable, Buildable, Puzzling, World-famous, Fun for adults, All-you-can-build with, Rare Earth, neodymium magnetic pebbles.
Mash it like putty or build like a pro; the secret of Speks is the size of the magnet.
Speks are good clean fun for everyone 14.
Each Spek is 2.5mm making it moldable, buildable, and compliant with all safety standards.

Safety: https://youtu.be/XrEqWnI7muI