This set of 60 wooden dominoes allows children to practice their times tables 1-12.The dominoes are colour coded into 3 levels and are designed to be used one level at a time.Green beginner level includes 1 2 5 and 10 times tables Yellow intermediate features 3 4 and 8 times tableRed advanced level includes 6 7 9 11 and 12 times table.All of the dominoes are manufactured from sustainably sourced wood and measure 9.5 x 3cm.