[qaibspdu] Magnetic balls toy

I played with a fun set of 216 spherical magnets.  They stick to build things, but they only stick in certain ways due to polarity.

Create a balls that stick in any direction, like gravity.  I can think of two ways.

Microtechnology: Sensors and small electromagnets mounted on the inside of the ball which selectively activate when another ball is touching, automatically negotiating who is north and south.

Nanotechnology: Some sort of sticky surface, like velcro, but will always stick to itself.