Crayola Modeling Clay is a versatile, non-hardening clay that is completely reusable. It stays soft even after molding, ensuring it can keep up with your child's imagination. It's designed with a wax and oil based formula, which makes it water-resistant. Plus, Crayola Clay is created with non-toxic materials so parents don?t have to worry, it?s a safe clay for kids, ages 4 & up. The neon clay colors included in this set are Green, Pink, Yellow, and Orange. Let imaginations take shape with this reusable, non-drying clay in vibrant neon colors! It makes a great stocking stuffer and Easter basket filler!