Non-toxic, 16 colors: red, green, blue, egg yolk yellow, black, brown, orange, purple, pink, grass green, sky blue, sunshine yellow, gray, tan, peach. made from locally grown soybeans by organic farmers, colored with mineral pigments. A complete natural chalk from renewable sources. Crayon Rocks are non-toxic and conform to ASTM D 4236, CE, EN71 and CPSIA. Suitable from 3+