These durable, double-sided flash cards are great for home or classroom use. Can you find the cards that are opposites? Each card features words and photos on both sides to help illustrate the differences. Cards feature a hole in the top corner that can be fit with a ring or string for easy organization and storage. Additionally, one corner is shaped differently than the others, making it easy to face all of the cards in the same direction. Includes 56 cards, each measuring 3 1/8" x 5 1/8", and instructions and tips for teachers or parents. For ages 4 and up