A very versatile and unusual deck of cards and a must for every classroom and therapy bag. The deck includes 81 cards. Each has either 1, 2, or 3 symbols on it. The symbols are either ovals, squiggles, or diamonds; either red, green, or purple, and either solid, striped, or open outlined. The original game calls for players to find SETS - 3 cards that have 3 attributes in common (i.e. all open, red, or go in number sequence). But these cards can also be used for sorting by 1, or more attributes. The uses are unlimited!