Set of cards that reveal brilliant colors when wet. Encourages writing skills, number learning, early reading skills, shape learning. Contains 10 reusable magic water cards and 1 magic water pen, in a neat case with elastic band. Cover case measures 7.4 x 7 x .7 inches, and the 10 inner cards measure 5.9 x 5.9 inches. For ages 3 years old and up.