Yosoo Artist Water-Washable 12/18 / 24/36 Colors Art Marker Pens Watercolor Water Soluble Fine-tip Pens Painting Drawing Brushes Art Supplies with Blue Box (18 Colors) Bright color, beautiful and durable; Great for kids Water-washable, relatively easy to wash Easy to carry and convenient to use, Perfect for writing, sketching,etc. Lovely box design;Length of pencil : 16.5cm/6.5'' Note: the pens is not fit for kids under 3-year-old