NeoCube: Cool New Toy

"Neo Cube - The New 'Rubik's' Cube"
Fresh-Buzz (May 2, 2008)

"This is one toy i believe it’s gonna be a huge success. Some people call it the rubik’s cube successor although it doesn’t have much to do with it. ... The NeoCube is composed of 216 individual high-energy sphere magnets, which can be formed into BILLIONS of shapes and patterns."

There's a video (1:37), showing how the spheres can be manipulated.

NeoCube shapes can be three-dimensional: Sooner or later, someone's going to twig that this thing can be used as a teaching aid, demonstrating crystal lattice geometries.

You could make a bracelet or rings out of those spheres, although whoever wore it would have to be awfully careful about getting near certain metals.