Cards have write-and-erase surface. Write-and-erase marker included. There are 26 double-sided cards that measure 5×8 with rounded corners in each set. Brain Games Kindergarten Activity Cards feature 201 activities that tackle key benchmarks across language arts, math, science, social sciences, physical and emotional development, fine arts, and foreign language. Activities are illustrated with art and photography, presenting the material in a fun and engaging way. Use the included write-and-erase marker to complete each activity. Have fun learning with your child today!