These round dice really do roll and work - they are not trick dice. Use just like a regular dice. A weight inside allows one side to distinctly display a rolled number. Pips are painted onto the dice. The 10 dice come in a convenient plastic resealable bag. Receive 2 of each of color: red, white, blue, neon green, and black.
Koplow Games Dice are some of the best in the hobby, with well painted and etched numbers/pips/text.

WARNING: CHOKING HAZARD - Small parts. Not for children under 3 years.