The paint is in the crayon! Watercolor art for young artists is easy. Just add water using the included paintbrush to instantly mix these gorgeous, bright colors. Crayons have more color pigments and less wax which results in brilliant colors. They have a smooth texture and no waxy build-up, plus their triangular shape offers better control. Crayons measure 3-1/2 x 3/8". Paper-wrapped to keep hands clean. 15-color set. AP Seal, non-toxic.