Played in the same manner as traditional dominoes - you can choose which game is best suited to the ability level of your children. A) Colour players match dominoes of the same colour only B) Shape players match dominoes of the same shape only C) Both players match dominoes that are identical in both colour and shape. The 40 giant wipe-clean dominoes can be used for individual or group activity and are ideal for the development of pre-reading skills. Each domino is 8cm x 19cm.