Crayon Rocks were invented by a Special Education teacher who wanted to help her students develop their tripod grip muscles because handwriting skills depends upon this. Since a child's first writing tool is usually a crayon, that crayon should be one that encourages him or her to use thumb, first and second fingers in a tripod grip. This is what makes Crayon Rocks a wonderful tool for fine motor development. A really good crayon should take very little effort for young children to apply in great swaths of color on to paper. Color that goes on smoothly and easily, helps little fingers to grow strong as they spill their creative ideas on to paper. Children with cerebral palsy, autism, developmental delays and various forms of learning disabilities have tested Crayon Rocks in the classroom. Parents and teachers of special needs students often tell me how much their children love them. Made from American grown soy beans and manufactured in rural America. It's good for the kids, the country and the planet!