Sum-Up Tweet Description 'Challenging Game of Creative Equations'Belongs to the 3M Gamette Series. - BoardGameGeek Details Ages: 0 and up Category: Card Game Designer: Frederick A. Herschler Family: 3M Gamettes Players: 2 to 4 PrimaryName: Sum-Up Product Title: Sum-Up Publisher: 3M Time: 45 minutes Year: 1971
