THE ADDITION ALL FACTS THROUGH 12 FLASH CARD SET FEATURES 169 FULL-COLOR, SELF-CHECKING FLASH CARDS AND 1 ACTIVITY CARD. IDEAL FOR AGES 6+, THESE 2.91" X 5.82" FLASH CARDS PREPARE YOUR CHILD FOR CLASSROOM SUCCESS BY PROVIDING PRACTICE THAT STRENGTHENS BASIC ADDITION SKILLS. FEATURING ROUNDED CORNERS FOR EASY SORTING AND MADE FROM A DURABLE MATERIAL, THESE CARDS ARE GREAT TO USE AT HOME, IN SCHOOL, OR ON THE ROAD.