Designed to strengthen the fine motor muscles, preparing little fingers and hands for pencil use. You can EAT these crayons if you want, but PLEASE don't inhale them. They ARE a choking hazard! Not for children under 3 years of age or those who will put them in their mouth Crayon Rocks conform to ASTM D 4236, are certified non-toxic, are vegan, and CPSIA compliant.