ravensburger aqua doodle peppa pigFirst coloring fun with Peppa Pig completely stain free and safe! Simply add water to the pen and children can draw to their heart's content on the magical Aqua Doodle painting mat. The secret: the mat turns blue when it comes into contact with water. When the water dries, the lines disappear and the drawing set is ready for a new work. Ravensburger's Aqua Doodle guarantees the highest quality in function and workmanship, ensuring safe and long