Doodle Magical Water Painting Mat (Sealife & Marine Learning theme, 2.5 feet by 1.5 feet) by 2ndClassroom Easy to use, just add water to invisible marker No fuss, no mess. Ready to be used again once the mat's surface dries. Inspires children's creativity without them writing on the wall! Colorful paintings are possible with the printed rainbow background pattern. Mat measures about 2.5 feet by 1.5 feet (28" x 20")