1With four cards themes for optional, each card is accompanied by exquisite illustrations help to develop children's left and right brains. 2A good tool to train eye-hand coordination skills, improve dexterity, expand knowledge, a good toy for child-parent playing. 3This write-on wipe-off card deck features reusable surfaces so kids can easily practice their work, wipe it away, and start again! 4Cognitive flash cards are combined with children's life scenes to allow children to learn in games. 5Using the included dry-erase marker, children will master upper- and lowercase letters, as well as words and mathematics.