For 1 to 5 players, this challenging game helps to develop logical analysis, visual perception and mathematical thinking. Players draw with erasable crayons on the plastic game board (of which there are 5) and keep playing, by trial and error, until success is achieved. The game can be played in two ways and at three levels of difficulty. Beginners play by merely coloring in the squares and more advanced players play by filling in boxes with numbers. The set includes 24 different sample patterns, 1 dial (for competitive games) and 8 crayons that are erasable with a damp cloth.