Made with natural wax blend & natural earth pigments (bees way, soy wax, and carnauba wax). Shaped from sea rocks. easy to hold, hard to break, never needs to be sharpened! We create the shape using molds made with actual rocks picked by our children along the Maine coast. The shapes make it easy for little ones to grab. and also allow for a varied crayon edge. from fine point drawing to shading! Each unit includes 8 colors: red, orange, yellow, green, blue, purple, brown & black.