Wishy Washy Markers are a revolutionary way of drawing on paper, plastic, white/chalkboard, windows, etc. Colors are vibrant, and there is virtually no-smell. Wipes up on non-porous surface. Please note, it does not erase on paper. Contains 12 Colors ! 4.5 mm tip. Mini size for the tiny hands. Because creative kids shouldn't have to be decisive, they can erase & draw over and over again. Just wipe with a wet cloth to erase.