Soybean oil and wax formulation makes crayons brighter and smoother than ordinary wax crayons. Crayons in crisp, true colors offer excellent blendability and color purity. Easy-open tuck box keeps crayons accessible and safely stored. Prang Crayons are made from a unique soybean oil formulation. Made from 100% renewable resources and do not include paraffin wax. AP certified non-toxic.