Crayola is synonymous with paintbrushes in the United States, with a popularity of 99%, and is also a recommended brand for art teachers and parents from all over the world. It was born as early as 1903 and is sold in more than 80 countries around the world, and the crayons sold each year can be connected to circle the globe more than 6 times. Crayola's watercolor paints comply with ASTM D-4236 and are certified with the AP mark to ensure that they do not cause acute or chronic harm to the human body even if ingested. Crayons with the "washable" logo can be easily washed on the skin or on clothes, and they are not too expensive.