Help children develop mental calculation and counting with Roll A Sum dice. Simply roll the dice and let the numbers guide your counting. Firstly roll the dice and look at the upper face, then group the dice together that are related. Choose the dice you want to use and the best dice to start your sum. Contains 10 dice and 1 carry sack. Ages 4-9 yrs. WARNING: CHOKING HAZARD - SMALL PARTS. Not for children under 3 yrs.