12 Plastipastel pencils in different colours, with interior tray. Plastipastel pencils are colour pencils made using injected polyethylene plastic. Clean and resistant, these pencils are ideal for young children. Their triangular design with rounded edges means that they fit perfectly into the hands of school children and prevent the pencils from rolling across work surfaces. Fine lines can be drawn using the tip of the pencil,thick lines can be drawn using the end part and larger areas can be shaded using the entire length of the pencil.