The game revolves around 50 tiles numbered 1-9. Using these one can play a number of games involving single digit addition and subtraction. Accopanying manual gives 10 such games. Different boards required to play these games are also suppllied. Play these games sequentially, moving ahead as you master them. These games give a very good mental maths practice eventually reducing the hanbit of finger counting nd help boost the child's self confidance.