Ravensburger Aqua Doodle Travel The perfect painting fun for on the go Carrying case and magical painting surface in one! Easily fill the pen with pure tap water, and it will magically turn the white painting surface blue when in contact As soon as the water dries, the paintings will magically disappear No stains - the colour is made of pure waterWARNING! Only to be used under the direct supervision of an adult.