Crayola 12 White Chalk & 12 Coloured Chalk Perfect for writing & drawing on blackboards. This special anti-dust formula in these chalks minimises the inhalation of dust. Designed to be strong, Crayola Chalk is less likely to break & provides a consistent colour throughout the stick. These 24 pieces of chalk come in a special anti-dust formula dramatically reduces mess & dust inhalation making them suitable for young children. Great for arts & crafts, Crayola chalk is an excellent way to develop creativity.