Crayola-Multi Color Washable Sidewalk Chalk. This sidewalk chalk has bold colors and the square anti-roll shape keeps chalk from rolling down the driveway. Each stick is layered with four different colors of chalk for multiple color lines with each stroke. And when you are done, simply spray away with water. This 4-1/4x4-1/4x7/8 inch package contains five multi-color chalk sticks. Recommended for ages 4 and up. WARNING: Choking Hazard- small parts. Not for children under 3 years. Non-toxic. Conforms to ASTM D 4236. Imported.