Linking Dice by Nobuyuki Nojima

Although magical it can also be performed as a show of skill. It looks difficult but is actually very learnable after some practice.

You show six ordinary dice and stack them into two towers of the three dice between the index finger and thumb of each hand, forming an impenetrable circle. Locked into position you then proceed to link and unlink your hands without the dice changing position or dropping to the floor.

This is based on the old toothpick/match stunt that was recently popularized with a cigarette. It does not use any gimmicks. Just six ordinary dice and your skill.