Skill-building fun on the go! Kids love these colorful cards for learning new facts and practicing skills. An ideal quiet-time activity, Pocket Flash Cards are even more fun with friends. Best of all, they're value-priced so you can keep a wide variety of titles on hand. Photos teach kids opposites. The word and its use in a sentence on back. Durable cards, no see-through. 56 two-sided cards per set. 3 1/8" x 5 1/4".