Four game boards and 32 playing cards, eight per theme, bring variety to the search for constants. Symbols in the upper left hand corner of game boards and playing cards make creating sets easy. Choose a theme board and place matching cards along the top and bottom. The items pictured are similar but different. The goal is identifying the number of objects on a card and matching constants. When finished, turn cards over and place on the board. If matched successfully, the cards combine into a larger image.