Spin Master Aquadoodle Draw N Doodle Jumbo Mat Includes 1 large 13.5" x 18" Magic Doodle Mat and 1 Magic Water Pen^The special large mat rolls out for more room, and more friends to help your child draw^Aquadoodle is completely mess free and colors may vary^Let your child experience the magic of Aquadoodle^Color appears when water touches the mat! Just add water and doodle away