This set allows children to practise addition and subtraction from 0-20. These vibrant dominoes are colour coded, helping to develop colour recognition and patterns. Addition dominos are blue and Subtraction dominoes are purple. The set is designed so you practise either addition or subtraction at any one time. Dominoes are made from FSC beech wood and measure 9.5 x 3cm. Contains 20 addition and 20 subtraction dominoes. Age: 2+.