Crayola Classpack provides multiple colors to choose from. * Perfect for classroom and group activities! * Great Quality at the best price! * Free lesson plan book included! * Portability easy to distribute! * 1-oz. packs give teachers control over the quantity given out in the classroom; less waste. . * Air-dries to a smooth, resilient finish, usually within 24 hours. * Ideal for a wide range of hands-on learning projects and sculpting activities. * Self-hardening nontoxic modeling compound. * Self-hardening, nontoxic modeling compound is soft, clean and easy to use.