Fill the pen with clean water and draw on the mat. The marks will magically disappear after 3-10 minutes (depending on the temperature and air flow) kids can draw on doodle board mat again and again. 18.1"x11.6" can be packed into a bag. Leaving more room for your kids doodle art. Also A great learning toy for toddlers kids. Manufacturered by ROBTLE. Educational gifts of intelligence: never make a mess clean and safety for babies and children. Don't need to extra cleaning. The back of the mat is water-resistant PVC material no worry about wetting the floor. Environmental protection no ink No paint. Best learning drawing water mat. Perfect learning toy for kids. Not only a toy but also a communicative link between parents and child. Doodle drawing mat is made of soft polyester material eco-friendly and non-toxic non-polluting safe enough for kids.