Power up kids' math skills and confidence. Contains 4 card sets to energize skill practice and mastery: Telling Time, Addition 0-12, Subtraction 0-12, and Math Splash War. Self-checking flash cards feature answers on back for independent learning. Great for school, home, childcare, and travel. Durable, no-see-through cards. Quick-sorting, rounded corners. 56 two-sided cards, 3.125" x 5.25" . Coordinates with Sea Buddies Collection. For ages 5 and up.