These Lift-the-Flap Cards have large words, images representing the meanings of the words, and interactive sentences describing the photographs. Detailed instructions are included. These cards can be used as teaching cards or for playing games. They are durable and easy to use while on the go or at home. Includes 60 cards. Note: These are not sliding cards. They are lift-the-flap cards that have large words, photos, and interactive sentences under the flaps. If you purchase this series, you will be buying from the creators and producers of the very popular series. There are many counterfeit items that look similar, but the cards may not slide or the DVDs may not work on some DVD players. The only products that you can verify as new and authentic are from the Infant Learning Company since we are the only producer of the Your Baby Can Learn! series.