There are Numbers, Animals, and Vehicles in addition to the alphabet cards.
The cards come with a ring to store them on and a little case for the water pen that also hooks to the ring. To use the cards you fill the pen with water and "paint" on the cards to reveal the picture and trace the letter. When the card dries you can do it again! I think this would be a great activity to use in preschool or with K-2 kids to review their alphabet. Once B outgrows these flash cards they will definitely be moving to my classroom.